1350T screen question

I have had my Nuvi for about a week now and noticed something I'm not sure is right. When I'm taking it off the mount I can see the pressure from my fingers on the back of the unit distort the top of the screen. I'm sure some of you have pressed on an LCD screen and seen the colors distort.

It only does this at the top center of the screen, not the sides or anywhere on the bottom. I'm just worried that over time it'll screw up my screen, Probably the day after the warranty expires