User:CallumGuest made an article for himself, which I attempted to move to their userspace instead. However, I didn't notice before the move that the article had a space that the username did not. Could you either rename this to the correct userpage, or just delete it? (along with the leftover redirects)
I think you misunderstood. He created "Callum Guest" as an article, not a userpage. I was the one who tried to move it from there to his userpage, but I didn't notice before the move that the article had a space between words that his username does not, so it ended up being moved to the wrong place.