I made a downvote and a suggestion to http://stackoverflow.com/a/11505552/974555 . Subsequently I tried undoing my downvote, but I get the message "You last voted on this answer 19 minutes ago, it is now locked unless the question is edited.". Here:
it is said that this behaviour won't change, and it is also said that I can't cancel because he was too quick in improving. My question is why. Why can't I undo a downvote upon the user improving based on my suggestion? Why is this not going to change?