I have installed the following module on 1.3.6 (the site just went live a few weeks ago)

Stock by Attributes
Version: 4.7
Zen Cart™ Version: v1.3.8

But when someone makes a purchase it does not deduct from the inventory level for products with attributes stock. It does deduct from the product category stock.

I have tried looking around for an answer to this problem and have not been able to fine one yet.

Has anyone had this same issue?

Thanks in advance for your help.