You need 2 cubic meters of pure wood to create 1 chest that is smaller than 1 cubic meter.
a chest is also not a block of pure wood so I think 2 logs for 1 chest is just a weird thing where you didn't think about after notch first created the recipe.
i would suggest to don't change the recipe but give 2 chests in stead of just 1.
Hi there!
This is a feature request; not a bug.
If you'd like to give suggestions for a change to the game as it is, you can do that here: https://feedback.minecraft.net/hc/en-us.
Also, please don't use foul language.