Zuphyx said:

actually I only put on like 3-5 tags when I uploaded it, but I'm pretty sure moderators add tags themselves, and they get really thorough (and mildly innacurate)

Not admin, if it was that they'd show up on the tag edits page. The system can add tags/change tags depending on what's added. Adding princess_celestia for example will automatically add my_little_pony and friendship_is_magic tags. Dickgirl, cuntboy and herm tags add the intersex tag. So on. Depending on what kind of tag you added the system may have changed one of them to dickgirl, similar to how it turned one or more into invalid_tag.

(Also no offense meant by the earlier comment, sometimes people will tag an image with only a single herm character in it as "female, male, herm, dickgirl"...happens often enough my works never done...)