It's a lot easier if you just treat credit card payments as a transfer to the card from checking. Expenses stay in the card, and the checking just shows the transfer since the payment isn't an expense.
I understand that MoneyWiz might be working differently to what you're used to. Indeed, how Matt suggested what we encourage people to do is to register your transactions made with credit card in the credit card account in MoneyWiz. This might come in handy for a lot of reasons - for example if you need to get a refund for an item and provide the original payment method used. Was it a debit card? Was it your credit card? If we just merged your transactions over to checking account this information would be lost. True, we could provide a new data field to store this information but it'd complicate the application a bit more.
I'll note your feature request nevertheless! Just a note that you can generate Expense Categories report for your credit card account to see what you are spending your money for. The total of that report is what you need (or already did) pay to the bank. If you need to see this information on a report on its own, Cashflow report displays transfers between accounts.