Ford 9" on a Dart brake shoe question

I dunno if im tired, slipping or really just never noticed this before, but Im doing new shoes on a '69 Superstock GTS Dart that someone put a Ford 9" in, so my application is like an old 70's ford passenger car. The new brake shoes have more lining on two of the shoes than the other two. For some reason I've never seen this before..... Common sense is telling me that maybe its random, from a second rate reliner shop, and if anything I should put the longer lining on the rearward side (the parking brake applied side). Anyone have any actual wisdom on this, or am I just thinking way too hard??? I really don't want to wander over to the Mustang forums and ask them lol. TIA, Lefty71
Ive never seen a set of shoes any other way!!