Major issue on double click reserve/cancel booked seats

On MyTicket Hall I have 2 products attached for different dates. When I double click to close/reserve some of the seats for a specific date/product it sometimes may reserves on other date products. The same issue present for the canceling reservation/booking: when I double click to cancel some reservation for specific date it may cancel the same seat on different date randomly. This happens very often, and I had to shut down the website because of this.