I downvoted a post yesterday and it got undownvoted today. Can the privileged users access my account and make these changes? Who else can make this change?
Jason as far as I know, you can upvote and downvote on any post and it shall not rollback, unless you have a serial upvote or downvote on a particular account. Technically, anyone with access to the database (which would be the SE developers) could change the vote, however this is only done when the voting is found to violate the rules (serial voting and using a sockpuppet to vote for your own posts).
Another thing might be that your vote was not reversed, but that someone else upvoted that post .
I downvoted a post yesterday and it got undownvoted today.
If you have downvoted a post then it will appear like this
was the color still orange when you check the post again?
Or is the post like this now?
If it's not orange then you probably has double clicked on it (undownvoted it) like animuson' comment says.
Can the privileged users access my account and make these changes?