@MMK48
"Would they allow me to add another line in the same Journal Entry and somehow get it into the vendors account?"
Nope. You can make two journal entries:
#1 - Debit A/P (list vendor), credit Clearing Account
#2 - Debit Clearing Account, credit A/R (list customer)
But, then you need to apply those credits to the invoice and bill. The instructions in my first do the same thing but in fewer steps.
