Sub not in game for disqualified player

[CoachJW]

A1 commits an and-1 foul. Team B is at the FT line to shoot the one free throw, players are lined up. The table informs the reporting official that it was A1's fifth personal foul. Team A's coach calls his players over to talk during the 20 seconds that he has at his disposal to get his sub in the game. The 20 seconds is up, they break the huddle, and player A1 is still on the court, walking to the other end of the court to line up for the free throw.

I was Team B's coach, so I noticed he was still on the court and asked the table, "Didn't #15 foul out?" and they said yes. At that point, Team A's coach noticed that he was still on the court and got him to come back to the sideline. The officials saw this whole thing and didn't do anything, so I protested that Team A should be assessed a T or at least a DOG warning (and they had been catching the ball after it went through the net all night, and that was never called either) since they had an ineligible player on the floor after the 20 seconds. It seemed pretty clear-cut to me, and one of the officials has a great reputation locally and usually calls a pretty good game.

I didn't make a huge stink (with one T in seven years of coaching, I'm generally mild-mannered), but I wondered if people on this board would have handled it differently.

As an aside, the issue of the DOG warning on a made basket/scoring team catches the ball after it goes through the net seems inconsistent with our local referees. I'm wondering if there are guys out there who will only call that if the player catches it and throws it off to the side, taps it, etc, or if you call it any time they even touch it. Thanks and I always appreciate the responses and information I can get from the officials on the board.