What he's saying is that your blow out rule kicked in when you went up 25ish with 4 minutes left.. and you had too many people on your active roster. If you're 2 position training, you shouldn't put more than 8 people on your roster that way you don't have anyone left for the coach to sub in to play the positions you're training.
As for your stadium, 14,000 seats is a lot, and it's not like you were lighting up your league going into this game. You were only pulling in 11,000 at the peak last year. And in your first game you got 9500, which isn't that far off.. Then you lost a few games and attendance dropped to 7,000. I don't see what's so odd about those numbers. Start winning games, and your stadium will fill back up.