Vendor settlement automatic vouchers

Hi, I wish someone can help me with this.

Y have Dynamics AX 2012 R3 CU8.

When I make journas like this:

Two vendors (vendor 1 and Vendor 2) in the same voucher (vendors have diferent groups, same posting profile, diferents acounts).

When I settle open transactions on any of the two vendors, it creates autoomatic Payment vouchers.

This vouchers cause differences between ledger vs module.

The same journals at previews dynamics versions doesnt create this vouchers. 

Can someone explain me please, why this happen?

Thanks

Karla Chiriboga