Insufficient stock.

9 items in stock, customer orders 20.
The quantity in the cart gets set to 9.

Is there a message (popup) warning customer?
Is it possible to add one please?

Normally, the quantity field shouldn't allow the user to add more than 9 items at once in the cart if the stock is limited to 9. There is no message warning the user if it tries to add more but it won't let him. We'll look at that but it's not that easy to do

Thanks. I thought it might be tricky.