So I spoke to customer service asking about the fees I was getting charged that were greater than $10.00 and learned about this garbage practice of Quickbooks Payments:

I sent my customers multiple invoices (they need a separate invoice for each project we do).  On the customer's end they are able to do a batch payment and pay the total of all invoices with ONE singular ACH transfer.  You would think one transfer means one ACH fee, right?

NOPE.

Quickbooks charges a separate fee for each invoice even though they were all paid with one payment.  I had one ACH transfer payment that was charged $30 in fees because it was for 3 invoices.

Do yourself a favor and look for another payment company or go back to paper checks.  These fees on top of a monthly subscription are thievery.