I have noticed this for years. It is relatively minor, but it should not be difficult to fix. If there is a credit on the credit card, it will not reconcile correctly. The screenshot shows that after reconciling the card, Quicken reports a difference of -$172.40. In fact, the actual balance should have been +$86.20 rather than -$172.40 as reported.
It resolves once there is an amount owed on the card rather than a credit. This obviously happens if there is an overpayment on the card or if there is a refund on the card in an amount to cause a credit.
Regardless, Quicken should be able to account for the + vs. - amount.
