Thank you for posting this. Fascinating to me.  Makes me wonder:

Was this a DIY refinance where the borrowers had a 1-minute notarization by a sign-and-stamp notary (free at their local bank branch, the neighbor or husband's secretary where the employer paid for the commission and the notary does as told)?

Was this a save-money, no attorney "signing" (which shouldn't be in MA),  where the notary saw the wrong names, called the hiring company, and is the case 99% of the time, is STRICTLY told, "Do NOT change any part of the document. If you do, we won't pay you." So, rather than proceed correctly, left the text as is.  Then, before closing the file or selling the loan, the various under-educated, underpaid, over-rushed "auditors" never proofread the "boilerplate printed text" under the assumption that it is always correct. Review acknowledgment: there is lender's prepared form, notary signed, stamped name, commission expiration date - Check, good to go!

Reminds me of those 30-year title searchs done remotely from India where the town doesn't have on-line land records. :)