Macbook Pro lid not closing perfectly

Hi all.

I purchased a 15.4 in Macbook Pro two weeks ago and I carry it in a Swiss Gear SYNERGY Computer Backpack, but I noticed that my notebook lid isn't closing perfectly parallel with the hand rest base, i.e. the top corners of my lid are 1mm or 2mm apart from it.

I realized that when placing the notebook in my backpack, resting on any of the ports side, it causes the other side to create a (tiny) gap between the lid and the base (especially in the top corner).

So my questions are:

Is this normal, or is it related to the position I put the notebook in my backpack?

Would it be better if I got a carrying case that positions the notebook horizontally (like Vyper exo) instead of vertically (as in my backback)?

Thanks in advance!

This leaves me with a little bit more peace of mind. Sure it'd be great if it closed completely flat, but as it is, it's no big deal.

I only hope this "normal deformation" stops at 2mm max. I would certainly hate to see a 4-5 mm gap in there.

Would you then say it's the same whether I carry it vertically or horizontally?

Thanks guys!