events plus limited capacity events problem

I am using the events + plugin. The limited capacity functionality does not work at all! I have activated the limited capacity events plugin and set up several limited capacity paid events. Every time someone goes to pay for an event on paypal it lists the number of tickets left available for the event. This number of tickets never decreases as users pay for the event, in addition a user is still allowed to attend and pay for the event even after the class limit is reached. Why does this not work as it is supposed to? Is there any setup required outside of the event and enabling the plugin that I have missed. Please help, this limited capacity functionality does not work at all!