county histories

Several years ago I found a biography of my G-grandfather in the Schuykill county history 1881 by Munsel.  I decided a few days ago to buy digital copy of said county history.  When I recieved the copy  my g-grandfathers biography was no where to be found.  When I asked the seller of this copy he looked at another copy he had and kthere was a biography of another gentleman of the same name on the same page.

I was just wondering if anyone else has had the samething happen to them?