Advance pricing- adjustment definition

Hi,

Items “K”  being charged with Excise tax ,Hence Item Group is linked to
adjustment detail with Hierarchy set as Item group/All customers.  But the question is this item is exempted from excise
tax for particular customer.  So I made reversal adjustment with new
adjustment detail type for that exempted customer, So a positive and negative adjustment
getting knocked off.  But the actual  issue here is negative
adjustment  creating separate pay item and due date showing effective as
GL date.  I think some change in adjustment definition should fix this.

Looking for advise

Thanks/RAO