Thread:Feedback/ Bug? Can't edit moved thread?

I just tried to edit my moved thread titled "Signature" (moved from Talk:Main Page to Feedback), but it wouldn't go through. Bug? Feature? Am I batshit insane?

The edit I wanted to make was deletion of the text... which didn't work, (may be due to the possible bug) for which I came up with another suggestion/question: Is there an option for a user to delete his own post, as is standard on most forums?