Whyu can't i reraise?

1/2 nl home game

one guy raises to 12, i reraise to 50 with aces, then someone goes allin for 66.  Why cant I reraise to isolate  since  the initial raise was to 12?  Any links?

By the way I had 450 in f ront of me. some moron calls 66 preflop with 9 10 os.  Flop was q-6-7 I bet 200 and he calls and another guy calls now  allin with KK ( why he did not go allin preflop is beyond me).  Turn 8 and guy with 9 10 pushes and i call my last 100 something in shock.  I am so angry i could not reraise preflop to the allin

It's the rule that's played in alot of places including major tournaments you can only call the shorties all in and not open up the betting again unless of course first guy reraises again. I have though seen it played differently in an online tournament.

Because the guy was a luck box and I did not want him to suckout.  Plus it was a 4 way flop with over 240 already in the middle.  I would have gladly isolated with that in the middle. 

   Also, no his reraise does not have to be as big as my 38 reraise.  I was told just 19 more and I could have gone over the top.

Betting and Raising

• Check and Raise is permitted in all games.
• In no-limit or pot-limit games unlimited raising is allowed.
• In limit games, there is a limit of a bet and three raises on any betting round.
• In limit play, an all-in wager of less than half the bet for that round does not reopen the action for any subsequent player who has already acted on their hand that round. A player facing less than half a bet can fold, call or complete the wager. They may not raise. An all-in wager of half a bet or more is treated as a full bet. A subsequent player can fold, call or make a full raise.
• In no-limit or pot-limit poker, a bet that is less than the bet or raise of the previous player does not reopen the action for subsequent players who have already acted on their hands.
• Any wager must be at least the size of the previous bet or raise in that round unless a player is going all-in.
• The smallest chip that can be wagered is equal to the smallest chip used in the antes, blinds, or rak

thank you for that link.  Honestly if he called 200 on the flop he would have called about the 180 more allin i had in front of me.  He was insane and insta called the 200 on a gutshot 10 high straight draw.  There were 4 players as it went raise to 12, me reraised to 50, guy pushes for 66, and then the nut with 9 10 off calls 66.  Sick thing is guy who initially raised to 12 flat calls the 66 with an option to raise and holding pocket KK.