Running 3.1.6h DT Register. Just had a successful registration come in AFTER the event was FULL. Haven't seen that in years of using DT Register. Obviously, not good! I thought maybe it was because two registrations from two different people came in close together so it let the second one in because maybe when they started filling out the online form there was an open spot. BUT, I tested and discovered if a person clicked the Event Details button on the main listing page and the register button/plug in was enabled and showed on the event details page a person could click it and it would open the registration page and let someone register. Yikes. I had an event capped at 14 and a 15th registration came in and then the Available read "-1"! From the main listing it read FULL and would not let a registration come in or one to click the FULL button. But, if someone clicked event details and the register plug in button showed they could click it and get a registration page and register.
So, I think there is an issue here?!
For now, I have disabled the Event Details button from showing.
Nathan, can you please look into this and report back?