As I was thinking about it, it may not be a bug but a punishment, but who knows.
When I go to the Top 50 to play, and I decide to return to menu, my score is reduced to the amount shown when it chooses your T50 opponent. I don't know if this is either a) a bug or b) a punishment for not playing the game (like quitting a match) but I'm hoping it is a bug.
I went from a score of like 388 to 277.

If it is not a bug, it should REALLY be explained clearer.