Temat: Player Minutes

I am not sure what is happening with the computer selecting player minutes. 2 of my players were placed as starters, with each position having back-ups. I have indicated that the back-ups are to play at least 1 minute in those positions and other positions (ie: PG and SG). The strange thing is: the main players will only play about 1:30 in the whole game. I am not sure if the computer is determining that they are not good PG's or PF's or something. Any idea's? Or has anyone else seen this?

I have it set up that if I am leading by 6-8 points depending on positions then the subs play. If I take an early lead then starters only play a few minutes.The starters don't come back if the lead stays above 8 points.