I love it.  Only abstractors make mistakes.  Nobody else. 

If they faxed to her as well, yet her fax number wasn't on the order, it seems logical to assume that they realized they had faxed it to the wrong number and should have contacted you.  While we would call and confirm if we noticed the mistake prior to doing it, if we didn't we would bill for the work done.  After all, we did not make the mistake.  They did.

My 2cents worth.