I had almost the same issue. Got my team set up properly and played a game vs the CPU figuring that maybe it was the safest. After a 10 inning win 7-6 the game said disconnected as I exited, said nothing about going to a queue and essentially I got no credit for any missions, did not get a reward, nothing. I assume I just wasted the time.
Although it was a fun game. I gave up a 3 run home run to Adam Wainwright