Hello everyone.. I'm a new guy here in case you have not noticed

So I was offered a bid last night but they disguised it as being something else we had to sign as part of their scheme... I knew what it was because I read a portion of the letter as I signed my signature. Anyway, so they called us out one by one and left me and a friend till last only to tell us that we won't be pledging this semester. I was so pissed and confused (I still am actually). I just got out the hospital yesterday afternoon from a lower back problem and they said that I'm a liability so I can't pledge. As for my friend they said he handed his transcripts and stuff too late. 5 minutes later my friend who got the same news called me asking to give him a ride back to school... he came into my car with a smile like he knew what was going on. I didn't ask him anything and just played along. So now I'm confused... why would they offer me a bid only to later on tell me "sorry you will not be pledging?"