User blog comment:Blokeymon/Devastated player seeking donations/@comment-1338091-20130708010337/@comment-11126608-20130708074339

Thanks man. It would appear that its a known glitch anyways - deleting worlds too quickly seems to confuse the system, and I had a fair few worlds to delete and was just going "delete, yes, select next world, delete, yes, select next world, delete, yes..." and so on, but without pausing. I selected the correct worlds, but the system got confused.

http://www.gamefaqs.com/boards/683104-terraria/66177858

Ah well, we live and learn. PS+ has the ability to backup all saves on The Cloud, so I'm going to do that ASAP. Currently rebuilt my main house better than it was before, getting statues one at a time, and just plodding along like before.