Same issue here..
An exchange that can't deal with two buy or sell orders at the same price. I don't even. Wow.
I place issue reported. next to exchange if anyone report i can completely remove it until fixed.
This is exactly what I warned you about. If you are going to have it only available on one exchange at launch, it better be competent. That or have two exchanges, one for an alternative. For all we know, that exchange could be your site, and you could... I think everyone gets the idea. If investors get burned, they will not try to pick it up again and risk a second injury.