Cart Update issue

[hawkwynd]

When a customer loads mixed types of products 1 or more "No Max Qty" product items with one or more "Max 1 qty" products, the update quantity fails to update the quantities in the shopping cart .

Note: when *just* "No Max Qty" products are in the cart, it functions as it should. I'm thinking it's somewhere in the /classes/shopping_cart.php adjust_quantity function, however I'm just getting into it today.

Can someone tell me exactly what the "Product Qty Min/Unit Mix:" really does or controls? I've tried YES and then NO it seems to make no significant impact on this case.

I appreciate any assistance offered.