When a legit book does something like this it means that there was a screw-up and somebody put up a bad line. Usually 1 phone call will cure the problem.
When a scam book run by thieves does this it means that the winning side will have their bets cancelled due to the "bad line" rule. No amount of phone calls or emails will cause them to change their line posting.
The better question is why the hell are you wasting your time seeing what Royal is offering. If you win you MIGHT see your money this decade. Is it really worth the risk?