Shopping Cart displays Purchase Groups of Different Companys

Hi gurus,

I've defined in Org Structure 2 companys with the same layout of Purchase Organization and Purchase Groups including the same Product Category distribution as shown below:

Company 1

     Purchase Org. 1

          Purchase Group (a)

               Product Category (x¹...)

          Purchase Group (b)

               Product Category (x²...)

          Purchase Group (c)

               Product Category (x³...)

Company 2

     Purchase Org. 2

          Purchase Group (d)

               Product Category (x¹...)

          Purchase Group (e)

               Product Category (x²...)

          Purchase Group (f)

               Product Category (x³...)

My user is under Company 2 and when I create a Shopping Cart using Product Category x¹, on item detail the Purchase Group proposed is Purchase Group (a) from Company 1 and when I open the drop down list I can see the folloing:

Purchase Group (a) (Company 1)

Purchase Group (d) (Company 2)

I tried many combinations on Attributes, Extended Attributes, etc but nothing worked.

Some knows if theres a way to limit this exibition based on the company the user is located on in Org Struc?

Thanks and regards.