When creating a partial settlement rebate order the payer is incorrect

Hello all,

I am trying to figure out why my partial rebate settlement order type is choosing the sold to party as the payer when the on the customer master the only payer available is a different number.

Example.

in the customer master i have SP 4002347, PY 4001460.

when i create the rebate agreement i have both of these values checked for rebate relevance.

when i am paying the rebate out to customer 4002347, the reb partial settlement order is coming out with 4002347 as both the sold to and payer.

is it possible for this order type to choose the payer that is listed on the customer master? I have tried multiple scenarios where i changed the partner determination in this type of sales order but beleive it should function as a standard sales order does.

Please help

G