Wrong Availability Status In Checkout

[dovalle]

Good Afternoon Guys 

 

I am currenly managing a store with PS ver 1.6.1 and transformer theme from themeforest. In the meantime we are experiencing an issue with checkout where it shows the same status: (in stock) disregarding available quantity  

 

In the checkout page It is supposed to show in the availability field "out of stock" when quantity is zero but id does not and We are not sure if this issue has something to do with the template or if it is a prestashop issue, 

 

Advanced stock management is activated for all products in store and we chose to specify available quantities manually

 

We appreciate any help you can give us