After order total product quantity updated on the wrong shop group

[Miss_Strangelove]

I have a prestashop installation with two shop groups that share products, like this:

 

GROUP 1 -Shop A

                 -Shop B

 

GROUP 2 - Shop C

 

When an order is placed on Shop C, attribute quantities are reduced from the correct shop. But product total quantities are updated on the wrong shop group (GROUP 1)

 

I'm guessing I will have to add the variable id_shop_group when updating total quantities

 

I can't seem to find file/function where that process is made. Can somebody point me in the right direction?

 

Im using prestashop 1.5.2 and advanced stock management is disabled, I'm setting quantities for each shop group manually

 

Thanks in advance

Edited February 4, 2015 by Miss_Strangelove (see edit history)