No doubt a culpability dodge. One way to deal with that is to certify the contents of what was received and send it back to them. Ya know..like a Certificate of Service but in reverse--a Certificate of Receipt. Correct anything that is off and let them know that you corrected it *for* them--and that as it stands with corrections that is what you are in receipt of. Give them 15 days to kvetch or make any statements or protests known. After that, file your stuffs with the recorder or in a LoR Jacket or w/e along with a document making it clear that you have made corrections for {CLERK} with her consent and that you have given him/her 15 days to reply. Something along those lines.
Its gotten to the point that I've started creating Activity Diagrams / Flow Charts or the like for handling process. To the readers: perhaps your mailbox and your box of bills is a court of record or at least evidence per the Federal Rules of Evidence or other applicable Rules of Evidence?