Gotta ? for you gals

I printed out a "save 0.50 on two" coupon for soup and accidentally printed 2... My question is, even though it says you can only use "one per specified purchase" does that mean if I buy 4 cans I can use both?

I'm new to the coupon thing and I wanna make sure I play by the rules so I don't get in line and end up backing up the whole process lol.