You must add a minimum of 10 ……… to your cart.

I have just installed the quantity rules plugin. I’ve set the minimum quantity to 10. whenever I add 10 item to my shoppingcart this error comes up : You must add a minimum of 10 ……… to your cart.

unless I change the amount to 11 and back to 10 the plugin will allow to minimum amount of 10..

very strange??