"how they must use CC Liability function, but don't see those entries here, nor the actual cash entries. Doesn't QB entry for CC transactions automatically hit CC Liability on Co. A?"
I think you just confused Two Different Debt accounts.
The Credit Card for Company A = The source of the funds or "how" it was purchased. Whether paid by checking or by putting it on the credit card, the payment is Other Asset for Company A. Company A put it on their card. A Credit Card Type of account in QB is one of the many "liability type" activities. In this example, CC is the Source and Other Asset is the "Target" or the "What we just paid for by charging it."
Company B has a condition no different than Buying something and taking out a Loan to do so.
