Not really sure about a few things here. First there is a call that stops play during an attack for a player on the ground but not in any obvious pain or distress. At this level doesn't the game simply continue?
Then just after the drop-ball restart there is a simple foul. Careless only, both players go to ground but nothing more than that. Do the two cautions in that instance gain anything for the referee? True that the game is almost over but do those two cautions seem to help the tenor of the game or do they seem to increase the frustration of the players? Just cause there isn't much time left on the clock doesn't mean the game is over. In fact if the loosing team is gaining momentum there are still a lot of decisions that will have to be made by the end, the referee's job is far from over.