If the Remit has a Zero Dollar Payment, but it has Payments in the body of the Remit, there are probably Takebacks at the bottom of the Remit, which results in a Provider Level Adjustment.
If the Payments in the body of the Remit equal the Takebacks at the bottom, apply the Payments as usual and use Add a New Receipt to post the Takebacks manually.
When finished posting, the amount posted should be zero because of the offset of the Takebacks.