I have found that @tribesteemup cancel downvotes on @huaren.news at that time, but @tribesteemup
did not cancelled downvotes on @steemflag at that time.

at now, I have found that @tribesteemup cancelled downvotes on @steemflag too, so I will cancel my downvotes ,as my words in my post.

I don't want this to happen again. It's a waste both our vote mana.

thanks.