Because the admin policy is that someone doesn't get the full year ban unless it is double checked by another admin. They may just be banned for a day or so (depending on when another admin checks it) if they weren't actually hacking. Though Agreements usually only posts them in
this thread if he's pretty darn sure. Being that 1 year is such a long time, we like to be sure. (Also, if they notice they are banned and shouldn't be, it gives them something to appeal if a thread is started.)
(I have a huge exam in <2 hours which is why I'm not looking at it right now

, damn you Advanced Accounting!)