Thanks @jayna :)

Can you somehow tell the difference between intentional upvotes and those that occur simply due to curation trails?

I'm afraid not, you'll just have to check your blog feed each week and see if there are any votes you can remove.

It's your decision to delegate, be it to a bot, a curation trail, or someone you like - everyone has a different approach but I think with 50/50, it will be best for you to keep most of your SP in your account.

Upvotes to others is just your total votes, minus the ones to self.

Upvotes to different authors is the number of unique authors you have voted in the past 7 days.