Line item determination Ship-To

If I select 4130 as ship-to it will determine 3443 as ship-to at line item level

[IMG]http://i3.photobucket.com/albums/y76/nphield/untitled-3.jpg[/IMG]

I'd like it to determine 4130 at line item level. Unfortunately with my requirements I am not able to filter ship-to partner from sold to 3443. The only ship-to attached to sold to 3443 is 4130, so i'm confused as to why 3443 is showing up

[IMG]http://i3.photobucket.com/albums/y76/nphield/untitled2.jpg[/IMG]

Access sequence for line item

[IMG]http://i3.photobucket.com/albums/y76/nphield/a.jpg[/IMG]

Any Help would greatly be appreciated

Nick