The biggest thing we need to remember is the process of building cars involved human interaction. Hence errors were made, common, no, but definitely out there. I guess it depends on your definition of common.

Lynch Road fender tags contain many documented errors that went on for a short time until someone caught them. My favorite is the 1969 458XXX VIN cars built in 9/68.

D

Seeking 1969 Lynch Road fender tags/Build Sheets/Window Stickers/VIN - Over 2300 so far thanks to you!!
2018 Demon Challenger PY4 A8 Black Hood
2017 Jeep Trail Hawk
2016 Hellcat Challenger PCP A8
1969.5 A12 Super Bee WM21 V1H F6 D21
1969 Coronet RT B5 D32 M46 N96