Transport with multiple INBOUND deliveries

Hello,

whe handle direct deliveries from the supplier to the customer. We als take care of the transport planning in SAP. This planning is done on the inbound delivery. Here is the problem, when we plan a transport on multiple inbound deliveries the destination of the transport is not correct (it takes the adress of the plant and not of the customer). When we plan the transport with 1 inbound delivery, it's correct. Is this a setting or a bug?

Thanks for any feedback!!