Tracking Inventory without options not working

I have inventory tracking enabled in the admin settings. My products have quantities set and inventory tracking without options. Although the products do have a global option which was applied as a link. Customers get to order a product and choose a free accessory which is a global option drop down list that i do not track inventory on.

I received orders recently and noticed that inventory is not decreasing with each order. Any ideas what could be misconfigured.

Thanks in advance