I always figured they only did not let bets go through if the line change favored them. Here is how it went down.
Halftime, Kentucky/Alabama. Selected Kentucky and The Over. Denied me. Hit refresh everywhere on side panel and main page. It changed the total up to 74, but did not change juice on Kentucky -5.5. Saw that in the main page it went down to -110 from -115. Was curios hit "create" and my bet went through.
I always had a feeling about this because, just from an anecdotal standpoint it seemed like they only notified me/denied me when it was in my disadvantage where other books are more straight up. LOVE knowing for sure now.
FYI - I feel most problems one might have with a book should be taken up with them...but feel this might be helpful to inform everyone here. Also, not about to try to explain this/complain to customer service. Would not get much, but a headache.