I don't know how you set your lineup. I do see that the player your coach selected to play at SF over (presumably) Jong pil was Radford, and that he appeared at PF at times during the game including a lot (or all, I haven't checked) of the fourth. Would it be accurate to say that you had Jong pil listed at starter at SF, Nart at PF, and then Radford backing up both positions? So when garbage time comes, Radford is locked in but he can't play both positions at once - and then for whatever reason, he plays at PF the whole time rather than SF.