Okay from what I understand we are all going to be divided into groups ABCD, and within that we'll be divided into 1,2,3. That's your tute ie A1. Then ignore the other tutes apart from the ones that say "A1" right?
Okay then there are groups just for the A group, or A+B groups. You'd go to those
Then there are all yearly groups/talks/labs whatever you have to go to
That's my understanding of it...