Edit by SBR:
This is standard policy at 5Dimes, most books actually just cancel wagers for off-market odds, which we're sure you would not prefer. It has always been the case and is clearly posted in the rules. In fact it is a policy SBR was consulted on many years ago and is more favorable to players who knowingly or unknowingly bet off-market odds.
"If a wager with an erroneous line is not voided before the game/play begins, Management reserves the right to remedy the odds to a fair market price which would have been available at the time the wager was placed. This price remedy may be applied during or after an event. Only the odds will be corrected on an erroneous line. The risk amount, applicable spread and total will always remain unchanged. A player will never benefit from betting on a clear erroneous line. Repeat offenders will not be tolerated."
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I'm done with them. They could tell me they don't want my action instead of stealing money.
Definitely not what A+ books do.