I also had all my ranks rolled back to when I was TTT Admin, Deathrun Mod and not Bhop staff, also losing my avatar and having to reset that. Luckily I was still TS staff at that point so I could fix that one myself (this could have been an issue with TS itself, rather than the server, however)
Probably something to do with the extensive downtime, the ranks and channels do exist now though, so that's one thing sorted.