Problem with tags while adding existing posts

I've been taking a look at Tag History and I've noticed the mess I produced with already existing posts.
It seems like if the post already exists and the user posted new tags that are not in database yet it goes directly and adds them.

Although I think it's a cool feature, I think that if the post exists, "tagme" shouldn't be added to there, it can only produce a properly tagged post appear again for tagging.

I mean the user that uploads the image doesn't really know all the tags he has to put on it in most cases so it's pretty common.

Just a suggestion though

it's only a problem with normal members trying to add an already existing Questionable or explicit post, really. Since you can't sort out the tags to keep or drop yourself, can only use history to revert changes. But if you do a md5 search before you upload thoses type of pictures, you should not have any problem.

Edit: can now add comment and edit tags on q/e and unaproved posts now, albert probably fixed it.

For some reason danbooruup isn't calculating md5 of images (on the proprieties window) on my system so I guess calculating an md5 over each image would be very time consuming...

Well anyways I think ignoring tagme when adding an already existing post isn't really a difficult fix but that will be albert's last word, since I don't have the minimum idea of RoR.