Bad Numbers-Advice Please

I saw a similar situation thing on the Mayweather/Mosley fight. My local book with website had the usual over/under 11.5 rounds, but it was worded wrong: Fight will go OVER 11.5 rounds and the Fight will not go UNDER 11.5 rounds. Both bets are the same thing. Figure didn't want to bother with it.
Sorry but as I am new I do not know how to put quotes in the boxes to show what I am replying to. When I said what do I do I really didn't mean that I had any options as the bets were already cancelled. I was simply trying to get some discussion going on what people's opinions were on the situation. Some have said they wouldn't bet it cause it singles them out or would be wrong. Others, I guess, might try a small wager to see if it would go even though they may not admit that on here as some see it as wrong or dishonorable and they dont want to be labeled. I do not think it wrong to take advantage of bookmaker's mistake. While I would not steal his money or allow him to overpay me I think he should be accountable for the lines he puts up. Just because he puts up a bad line does not mean I cant lose, as evidenced by tonight's game. Many might disagee and thats what I wanted was opinions. Just as the cashier paying too much example points out (my apologies for judging too hastily Burger) it can be handled different ways by different people and those that would just keep the money would not admit that on here I think. One last point that is brought up is what is a "bad" line that you shouldnt bet?? Again, forgive my naivete but using basketball is it 1,2 or 3 points or more??
bkeiller our good man, this has happened to all of us I believe. First, I doubt any sportsbook, agent or local guy is going to give you the boot if you have been donating to them. Second, you were not trying to hammer multiple max limits. It's a sticky wicket no matter how you slice it. I usually find key injuries or issues before the sportsbooks with teams or players or golfers etc., and I've bet them and I'll estimate I've had 55% cancelled. The sportsbooks simply took the game or matchup off the board and cancelled my wager. Why?!!!!!!! Because we beat them to the punch. They cannot stand to be outsmarted so their recourse is to void your ticket. Is that moral? In your case it is different. The difference between +150 and/or -150 is an input error, I don't have a problem with them cancelling that one. I've gotten a few through the cracks and I'm not feeling guilty one bit.
The only place you can get away with this is in Vegas because once you leave the window and the bets are paid for, its a bet. Personally I think its BS that the sportsbooks are allowed to cancel wagers. There is no accountability for them and they obviously don't take enough pride in their work or there wouldn't be mistakes. I've made mistakes wagering and asked for a void and only very rarely received one. I probably wouldn't take a shot at someone I had done business with for 10 years, it strains the trust in an obviously good relationship.

Thanks for all the input guys. I wuld probably feel a lot different if the pay/collect ratios weren't 10/1 (and I WISH I was exaggerating, also one of the reasons I joined the site, to learn). Some of us dont catch on so quick and I like the action. If I had won some max bets taking a shot and he had to pay me I likely would feel guilty but if I won some normal size plays and it meant I payed him next week instead of this week then maybe not so much. Maybe I am splitting hairs but thats the way I feel. And incidentally they also cancelled Clev +3.5 -350 which was also a big loser. So I would have had 1 small winner and 1 small loser and 1 big loser on the night. They saved me some dough. And this may sound silly but I think a sucker like me deserves a bad line now and again since I dont get any comps from a local guy. :)