How Many Glove Box Springs Are Factory Installed ('65 Formula S)

My 67 barracuda had only 1 spring, I thought the same thing too. Then I thought about it from a manufacturers standpoint. I think the deal with the extra holes in the other hinge was simply from manufacturing. Weather it's a left or right hinge, they were prob all stamped out of flat sheet stock to a flat shape, then put in a press that will stamp the part either as a left or a different press that stamps it as a right. The hinge pin holes were probably used as alignment pin holes for the stamping press. I can just imagine somebody standing at a machine all day stamping out the flat pieces into a bucket, then shuffling em off to somebody else that puts em in a press one at a time, stamps it to shape. Pops it out And puts another in stamps that one, all day long for 8 hours a day.