Here's a gif to explain it.
Basically what happened: You're trying to add a new entry, but when you simply hover your mouse over another hyperlinked text, it automatically redirect you to the page. Then your edits are gone when you're back to the previous page.
I mean for regular user it wont be a that much of problem, but for the fellows who managed the collections, it's kinda an issue.
Basara, i suggest you this: when updating a collection, copy them as a whole and paste them in a new topic submission form. That way your edit will be automatically saved and when you're auto redirected, it will stay there when you're going back to the past page.
After you're done editing , copy them as a whole again and paste it to the original topic form. That's what i've been doing lately.
I made a thread in the administration section to point out this bug. Hopefully the new admin will take a look.
EDIT: They removed it now. The bug is gone.
I would like to point out a bug with links on the forums lately.
I also have been experiencing this, and the auto redirect is super annoying when you're trying to update a collection topic.
i opened it up in fighter factory and that is the actual sprites, pretty different from the preview in Mugenarchive
you can remove it up if that's a canon character