Bug?

Great game, and enjoy the 3 card kitty I was taught by Aussies. My only gripe is that in single player mode, I reach 500 points on the basis of gaining 10 points per trick in a losing hand, it is recorded as a loss of game for me. surely that is a bug ... Certainly not in any of the rules I was taught!

Boyfaeleith about i500, v1.8