Here is an example:
https://www.ebay.com/itm/1960-61-PEL...D/293247537629
PSA is grading 1961 Heinerle cards as 1962 Lutter Schutt cards. The difference is pretty easy: the 1961s have the two weightlifter back design while the 1962s show four athletes. They're also labeling 1962s as 1961s:
In short, PSA's work with these cards is a total random mess.