AbleCommerce Shopping Cart Software

We don't process the payment until after the order is placed and freight has been added in the admin, being that many of our items are so large. The problem is once freight has been added, and we go into the payment section, it only has the total of the original order... We're having to create a second payment for the actual balance with the added shipping and delete the first. Is there any way to have the balance amount in the payment section updated automatically to reflect any freight /shipping, new items added to order, discounts, etc.. that were added in order processing prior to running the CC?

Order Summary Page: Payment Page:

When you say merchant has to update the balance... Is there some way to update the balance prior to running the credit card that I'm missing?

Order Balance in your case is automatically adjusted. When you will try to 'Capture' the payment you will be allowed to capture the whole remaining balance not just the original authorization. Just try the capture and see what you get on CapturePayment page...