It could be related with the number of Personal Faults being made by your primary PG.
Same happened to me my last scrimmage. My starter PG got 3 PF in the first 3 minutes, he got substituted untill the 3th quarter. In the 3th he came back in, made his 4th PF in his 4th playing minute and got substituted. The final quarter he got some more minutes.
I see that your starter, Kerdijk, had 4 PF in both games. Maybe that's the problem.