The count is resolved by counting the maximum count possible during a TT with all people present. i.e. if 3 people arrive and then leave before 2 different people show up, we do not could all 5. That would be a max count of 3.

Previous outcomes:

1st - 11

2nd - 5

3rd - 13
4th - 15 <- max

5th - 6

6th - 11

7th - 13
8th - 7