It's all a conspiracy! You see, if they matched evenly, then when you ran out, you might end up procrastinating buying more... it could take weeks to buy more! However, if you have 2 hotdogs rotting in the fridge, then you might go out and buy more buns, and if you have buns getting moldy, then you might just go out and buy more hotdogs. Very clever, if you ask me.