On the 1st page of General Rules they state:
All wagers are final once accepted by management and confirmed by the player, either over the phone or online.
Members are responsible for checking all of their sports, horses, and lotto wagers in the review bets section. No Internet wager claims will be accepted without a ticket number.
Later on that page,this :
Book reserves the right to correct grading errors at any time. If an account reaches a negative balance due to the re-grade of an event, all in-progress pending wagers will stand and be honored. Since winning wagers in this instance will be honored, immediate settlement of losing wagers is also expected.
which essentially negates any confirmed wagers.
In the General Rules, this is the most pertinent rule to this particular case:
A bet made after an event begins based on occurrences that have developed while in-play, is considered a "past-post", and will be handled as blatant theft. This applies for all regular game lines or when play resumes in live in play wagering. All events intended for in-play offering will be noted as such on the wagering option.
And pretty much everything in the General rules could be negated by the typical disclaimer at the bottom of all rules & regulations:
All rules, regulations, and payoffs contained herein are subject to change and revision by the management
without prior written notice.
Books should be on top of this $H|T. Remember it's only your
till you bet it, once you bet it, it's theirs!