I have a problem with how categories are handled in OpenERP and I need to figure out what I need to do.

So if my categories are:

All Products
--Phones
---Smart Phones
----Android
----iOS
----Windows
---Feature Phones
--Tablets
---Android
---iOS
---Windows

The Android, iOS, and Windows categories are the same for both Smart Phones and Tablets, but the tree structure won't let me set it up that way. It wants Tablets->Android different than Smart Phones->Android.

When a user clicks "Android" I want it to display all Smart Phones and Tablets in the list unless they have previously sorted by one of the other categories. In this way, there is no way to show all Android Devices without filtering for one of the other filters first.

If I try to set it up the other way around, then I have three sets of Tablets under Android->Tablets, iOS->Tablets, etc. There does not appear to be a way to set this process up in v7?