Unpaid Balance results from a discrepancy of what we have on our system vs clover.  

You must have automatic syncing turned on in order to ensure that your prices match what our system has.

If there are any differences between items on our system vs clover the  discrepancies will result in differences between clover's balance and ours as they use their item ids to calculate the balance, not the price that we provide.

Please ensure your tax rate on the receipt as well as your item and modifier prices are the same.

This cannot be changed retroactively but once the changes are fixed it shouldn't happen again.

If you want to avoid this issue and still have differences, we recommend duplicating the item in clover than syncing and adjusting the duplicated item on clover.