B&M NL ruling

[DaveyDonk]

Was playing at the local casino this weekend in the NL game. The hand in question had a raise preflop and 3 callers. The PFR was 2nd to act postflop. After the flop was put down, he bet right out (he was the 1 seat, first to act was the 10 seat, so he didn't see him) for $40. The dealer then said it wasn't his turn, and the guy before him then bets $30.

The floor is then called over and they rule that the $30 bet stands and the PFR takes out $10 and it is now a call and it is now the next person's action. Is this the correct ruling? The PFR argued that he had never seen a ruling that allowed a player to take money out of the pot once it had crossed the bet line, and that this should re-open the betting. Also, would this had different if the guy first to act had bet just $10 or $20, making the PFR's bet double it?

Also a little while later the floor manager came over and told the disputor of that hand (the PFR) that in the future his $40 would be a $30 call and that the $10 would play on the turn, assuming noone raised behind him on the flop. Is this totally random or is this a legitimate way of going about this as well??