There are a bunch of new empty bans on the list, I've only ever banned like 4 people which i see on the list but then theres 56 other empty bans with no names that started on Dec 31, 1969 and end on never.
I'm pretty sure that you have orphaned user ban data. Have you deleted data directly via the DB or with some unofficial modification? That could cause it. You'll just need to remove the bans that refer to deleted users.