Multiple threads missing in certain communities

If I visit !wowthislemmyexists@lemmy.ca on PieFed, I only see 4 posts. But if I visited the same community on Lemmy, I see multiple pages of threads dating back to 2 years ago. Anyone know what's going on?

EDIT: Also, are upvotes/downvotes not federating correctly? I've noticed some posts having very different points between PieFed and Lemmy.