I can explain your "missing money" post.

This was very hard for me to get also.

First, as your post grows in age it can change value as the reward pool changes. There is only a certain amount that is rewarded each day and we all split that. So as more upvotes, flags or whatever come in, your value will sway up and down... normally down.

When it's time for payout, that is kind of like your striking price. That is when your price will finally solidify and become your actual reward.

Once this happens the reward begins to split. There is the curation that will take 25% of your post. That goes directly to the curators (people that have upvoted you). In this case that is the first 2.07 you see leaving your post.

The 75% that is left over (7.11 in your case) is then split 50/50 between sbd and steem power.

This is where it looks like its a glitch when in fact it is just hard to understand lol.

Ok, SBD is considered to be $1 worth of Steem (regardless the real value of sbd). The payout is measured as sbd. So the half that goes to sbd will actually be half of the total payout. In your case this will be 3.555 sbd. The reason it looks like the steem power is lower is that at the moment of payout steem was not $1. So, if we assume that sbd is $1 worth of steem and steem is valued at $2 usd today then that 3.555 (when reflected in steem power) will show as half... 1.7775. The system only sees sbd as $1 worth of steem so it is true to the payout amount. If steem was $1 then you would get an equal amount of sbd and steem power. if steem was $3 you would only get 1/3 of what the sbd would be.

Also bare in mind that those numbers do not seem to match your numbers exactly because you were collecting from that post and it seems there were also a few curation rewards there as well.

Make sense?