Employe responsible to be pushed to COPA document

hi

We ae able to push the employe responsible to COPA document

But when we are clubbing two dleivery orders in to one invoice

It is not picking the second order employe responsible in to COPA document

It is taking the first order employe responsible in to COPA

My requirement is when i club the two orders in to one invoice

First order Employ res (9000001) should be update in the first order line in the inovice COPA document

Second order Employ res (9000002) should be update in the second order line in the same inovice COPA document

Thanks and Regards

Kkd