Steem Bug - Multiple Votes From Single User on One Post

2 months ago
59 in steemit

I was making the voting rounds just now when I ran into a strange issue. I've noticed since HF 19 that sometimes posts would disappear and reappear after refreshing Home a few minutes apart. Perhaps more worrisome, though, I've also noticed that posts I was sure I've upvoted have lost my little blue up arrow bluey.png!!

I thought maybe I was just going crazy. Or maybe my upvote never connected to the server. This is reasonable, since the website and blockchain are getting slammed with activity after HF 19.

Finally I have incontrovertible proof of a bug!

Over the past half hour, I came across a post I thought was a good one:

kingscrown_post.png

So naturally, I upvoted it:

tx_1.png

Not more than half an hour later, I was browsing new posts again, and lo-and-behold the post I remember liking so much showed no signs of being upvoted by me. My natural reaction was to rectify the situation by upvoting it correctly this time:

tx_2.png

Finally, I refreshed the page again and was satisfied the white up arrow had turned blue.

Nevertheless, something didn't sit right with me. I was sure I'd upvoted it properly on my first attempt.

Rather than go through the trouble of manually parsing the blockchain, I used steemd.com for convenience to lay out my recent vote history. What did I find? No other than the proof shown above, that two separate transactions contain my votes for the post listed above. Here is the transaction history laid out reverse-chronologically:

voting_history.png

So there you have it; a post I was able to upvote twice! And with differing weights no less!

What could have happened here? Is steemd.com perhaps wrong? Was my first vote invalidated?

I'm hoping a dev or someone with more knowledge of the Steem inner-workings is able to answer these questions.

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Sort Order:  trending
46
  ·  2 months ago

Hi,

When you double vote on a post, your second vote cancels your first one.

Both votes are registered on the blockchain but only the last one is valid. Your curation rewards are 0℅ and your vote worth $0 for the author.

Here, look:

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69
  ·  2 months ago

I think that's right. I've seen this happened. Now when I vote for something and my bot passes after me, the second vote gets in to cancel my first vote. It didn't use to be the case. The bot used to skip a post I already had voted on.

I'm not sure how it happened for you that you were able to cancel your other vote without actually cancelling it but that seems to be what happened.

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68
  ·  2 months ago

Yep, @neander-squirrel is absolutely correct. There was definitely a display issue as to not show the previous vote on Steemit.com, and the second vote overwrote the first.

Interestingly, if the vote power was identical, the second transaction would fail :)

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71
  ·  2 months ago

Followed! UV this comment also, great job by you, I am not a big tech guy

LOL!!!

56
  ·  2 months ago

I have the same problem and I am mainly using my smartphone and ipad for viewing posts.

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60
  ·  2 months ago

Me too. It's happened to me a few times on mobile and through esteem as well and I was wondering what was up.

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56
  ·  2 months ago

I guess quite a lot of people have this problem.I have encountered this problem when using my smartphone (using chrome as browser) and ipad(safari). Quite shocked that esteem has this problem also. We need to be careful that not to cancel our vote and waste the precious voting power by mistake. I hope this problem would me fixed soon.

46
  ·  2 months ago

Hi @geoffrey,

Can you give me a link to the post please?

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53
  ·  2 months ago

Speaking of your upvotes, I just wanted to thank you for your upvote of my post today -- this one -- you were a big part of the push to get me a really nice payout on that post, which moves the needle for me on my goals here on steem and in general for me income-wise, so thank you again! Now following.

66
  ·  2 months ago

I think I have had a feeling something was wrong with some of my votes in the past but I didn't give it much thought then. Good find and thanks!

71
  ·  2 months ago

I have noticed a small handful of other sharp users saying similar things incl, one who has commented in this post and I was chatting by PM with!

Great find and thanks for taking time to write this up so well @geoffrey!!

29
  ·  2 months ago

Hi
Can anybody let me know what's with the figure in circle, like 25, 59, 72.......?

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59
  ·  2 months ago

That's the author's reputation. Upvotes bring it up, and downvotes bring it down. It's on a log scale. Here's more info on it.

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29
  ·  2 months ago

Thanks, upvoted again

56
  ·  2 months ago

I think this more a UI issue. Steemd.com clearly shows that your first vote was recorded on the blockchain.

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59
  ·  2 months ago

Normally steemit.com says "You already voted in a similar way" when I try to upvote a post that the website "forgot" about. This is the only time I caught it let me actually upvote a post that my browser isn't aware I already upvoted.

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56
  ·  2 months ago

That's why I think it's a user interface issue with steemit.com. I have voted twice on the same post before by mistake but using other interfaces other than steemit.com

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59
  ·  2 months ago

Ah okay, gotcha. Thanks!

55
  ·  2 months ago

seems like a pretty big problem.
@ned @dan @timcliff please review this

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56
  ·  2 months ago

dan is no longer part of steemit. If anyone should be taking a look at this is @sneak the current lead developer.

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55
  ·  2 months ago

o wow, I didn't know that! thanks

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53
  ·  2 months ago

Ya, neither did I. Hmmm. No worries, it was still his baby.

58
  ·  2 months ago

Hello @geoffrey, I feel you. Happened some time where I voted, refreshed page, vote gone, voted again, refreshed page, vote gone. Usually at the 3rd time it appears.

Another problem I encounter is with the comments. I write them, press post and they don't appear on the page and it is not saved in drafts. Since then I copy paste the text from a word file and doublecheck it if it has been posted.

60
  ·  2 months ago

That is alarming. Glad you notice. I hope the fix the bugs soon! It was strange, because yesterday I made a post... I swear I pressed post... I saw it briefly and then the whole post disappeared all together. I ended up just redoing the post and submitting it... but I thought that was strange.

73
  ·  2 months ago

wow good find and glad that my post was the one helping you to find it :) again i did something good for STEEM :)

57
  ·  2 months ago

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74
  ·  2 months ago

I think it is a display error. I have noticed that some posts that I have already voted on don't show a vote. Then I go to vote and it says I have already voted.

59
  ·  2 months ago

good post