Nope, 100% wrong. In fact it is so wrong the NRMP site explicitly states that is it not true:
"Can I make changes to my rank order list (ROL) after I certify it?
Yes, your rank order list can be modified or re-ordered any number of times until 9:00 p.m. eastern time on the Rank Order List Deadline, but no additions, deletions, or changes can be made to your rank order list after the deadline. If you change your certified ROL by adding, moving, or deleting a program, you
must recertify it for it to be used in a Match. The R3

system does not save previous versions of your rank order list."
The bolding above is theirs.