Segment override on SO/Invoice not working for CM invoice type

Hi all.

I have an invoice line entry that is not updating the segment override on the GL account.  This is a manually entered invoice in the SO module Invoice Entry screen - not generated from an SO.

The item is a Misc item with a Charge type.

When I enter the invoice using a Standard or DM type, the segment override works on the line entry.  When I enter it as a CM type, the segment override does not work.  The same customer and part are used - the only difference is the invoice type.

Why would the segment override (ar division in our case) not work for the CM type?  

Thanks for any insight!

Kathy