I can see the thread just fine. Do the posts show up as "unavailable"? You probably got "blocked", and should be able to see the thread in a private tab (...which makes no sense, and the blocker can still read your posts, they are just collapsed. If anyone blocks me, I take the effort to block them right back for mutual thread breakage)

Regarding actual deleted posts, unfortunately I think it's just how Reddit works. There's a site that tries to archive them (but removes user-deleted comments): https://www.reveddit.com/r/jerseycity/

Heres another one that keeps deleted comments (but doesn't have a post listing): https://www.unddit.com/r/jerseycity/comments/1005wsy/sos_where_to_find_yerba_mate/