You answered your own question:
" Directions say "provide each signer with 2 copies of the properly Signed and accurately dated NORTC"."
And naturally title/lender want a signed one back....sooo
Signers sign and date all six, leave 2 for Signer A, 2 for Signer B, 2 signed back to title
If you have only one signer, I'd have that signer sign and date 4, leave 2 with signer, return two to title