You have a poor circolation so that make your pg,sg take threes because they are unable to pass the ball in the middle and your PF and C take less shots. Your center take only 10 shots and probably with 5 off. rmb. that means only 5 shoots in action. Add that low post requires more circolation of LI that's explain why your center makes few shoots. He's averaging 0.420% that's pretty low, does he have low driving,handling? because in low post he will take the ball for long time. (sry for bad english hope you have understood everything :D)