I think I read that LaSalle only earns 1 credit between the "1st" and "2nd" round games. Both they and Boise St. got credits for playing the "1st" round game, but LaSalle doesn't get another for playing the "2nd" round game against K-State. Therefore, the A-10 has 5 credits so far. Assuming LaSalle holds on to win against K-State, the A-10 will get an additional 5 for games played in the "3rd" round.
However, I do not believe the A10 splits the money from the credit evenly. I think more of it goes to the team that earned the credit. There was a post about this a while back and it was something like 75% to the team that earns the credit and 25% to the rest of the league. Either way, more wins for the A10 is good for SLU (at least in the short term).