Demon Dates

Hello all,

New here and I joined because I've just bought a project car and getting ready to start resto but I have a strange question.

The Demon was built in 71 and 72 only right?

Well when I transfered the title, I noticed it was a 70 Demon. Not a 70 Dart or 71 Demon, a 70 Demon. I asked the lady to check again and she verified that it was a 70 Demon. Any Ideas?