How to use same approval group for different Item category group

Hello to all,

We are facing the following situation.

We have defined our items based upon 3 segements.

Currently we are using one approval group for all the buyers and have
defined the following rule;

- Atricle A (hase segment1 = A, segment = Bc , segment3 = C) set to include with amount < 18.000

which works fine, but now we have added a new rule

- Atricle B (hase segment1 = A, segment = Bc , segment3 = blanco, so no value used) set to exclude

What happens now is that when we order the Atricle A (hase segment1 = A, segment = Bc , segment3 = C)
the approval group is using the rule for Article B, and not anymore the rule for Atricle A.