Secrets of the Dead season 22 is all screwed up. The only correct listings are x01, x02 and x03. All the other episodes listed are duplicates of these three with the wrong air dates. x10, x11 and x12 are duplicates from S21.
Go to the show page and actually, the link you provided, go to that specific season, and on the bottom of the left hand side (sidebar) there is a link to “Report Season”.
Report these kinds of issues there, they get fixed a lot faster than using the forums.
I’ve merged the duplicated episodes in that season and now it matches TMDB, our datasource. Thanks for reporting!