Adding products with multiple attributes shopping cart

Version 1.3.9h

I have not searched at length in the forum on this problem because I am not sure exactly how I need to search it, so I'm either asking for direction for searching or help with the problem.

I have a product that I have added attributes to. I am using the Stock by Attributes module v1.4.14. If I go to that product on my site and select more than one attribute and add to the shopping cart,
then go to the shopping cart, it will show being out of stock. If I select an attribute, add to the cart, then select another attribute, add it to the cart, it works.

Should I be able to select more than one attribute then select add to cart?

Thanks in advance for any help.