I am explaining but you don't seem to be interested in listening. You are arguing about why picking a Monday game even on Monday itself should be okay. That doesn't matter here because in this game, the deadline is first game of Sunday. For six weeks, everyone has played by those rules. And now just because you forgot to pick, I can't change the rules and allow your pick.
Your pick could have been made any number of hours before that game and it still would not count if it was after the deadline.
The only point that matters is that there was a deadline and you missed it. So, you're out.