The "error" was not corrected because there was no error. 1972 Topps, like all early Topps cards, were released in multiple series; all the "In-Action" cards from this series have random player highlights on back. The Ken Singleton In Action #426 has a Ken Holtzman back, #448 Willie Stargell has a Ron Hunt highlight, etc.
me to thanx for expainin ive collected base ball cards for last 30 yrs never new what u just expained to sultanofsleaze about the error so thanx again i was wonderin you say its a reare card how rare cuz when i collected i had ten of them not interested at this point maybe if you relist cuz i dont have early cards anymore was robbed when i was 19 now collectin all kinds of cards except nascar and orioles/colts cards for my 5 yr old nephew all nascar and os and colts memorabelia is mine as im 43 and know how to save stuff but never fere im savein these for a rainey day for his future when me and his dad are no longer here sorry to be so morbid by the way sulton love that name got any cool stuff id like hit me up im destry prysiazny on here and facebook