isnt it against the rules to score it a draw for a specific round

I don't think so...

Besides which, if a judge really can't decide who won the round it makes better sense for the both fighters to share the round instead of a judge flipping a coin.

Even rounds are fine...in fact, I wish judges would score them like that more often. I hate it when one guy wins a whole round cause he threw like one slap versus the other guy's zero. To win a round you should dominate to a certain extent, I think.

OF COURSE IT ISNT.
it is however hardly ever used int he states, rightly or wrongly.
The judge Larry o connell is a Irish by the way hence he gave an even round exactly as he saw it, even.

fair enough in my view, as long as it isnt over used.

Alot of rounds are 50-50 and should be scored a draw. But not too much, use your good judgment on other cases.