Consider a situation where there is a very bad-looking question that is unclear (due to poor English, bad code formatting, ...).
I vote it down but then I realize that question can be made better. I go and edit it (and wait for peer review, because I don't have the edit privilege yet). Suddenly the question doesn't look bad at all. So I go and reverse the vote, giving it a +1-
I know that you can (and should) reconsider your vote if the question is improved by the author. But what if it were ME who improved it? :)
Is this considered a bad/weird behaviour? Should I instead remain neutral and not vote it down if the question is unclear and poorly formatted?