TOPIC: Shopping Cart Allows Over Subscription of Event...

I have run across an issue, was wondering if there is a way to prevent it.

I have a user who registers herself, and her friends on the same shopping cart for the same event. When doing so, she is not receiving an error when she has shopped for the same event, and has exceeded the event limit. She can successfully register all users for the event. As an example. I have an event that is limited to 4 users in the event config. She registers herself and six others. Making it a total of 7 registrations. The system does not block the transaction. It will allow the over subscription.

Any one, please advise. I am also going to open a ticket on this, was just wondering if anyone else has noticed this issue. Thanks!
~Scott