NBA 2k10 ps2 problem in association?

Hello, i have nba 2k10 on ps2 with great sliders 10 min, but i dont know in association when i looked for my team players stats or nba stats, my players have minutes per game for example: 60 mpg, so when i play 33 min, i have 66 mpg, all x2 mpg and minutes, so i dont know this is bug or something doing with settings?

best regards.