2015 MacBook Air creaking/loose backplate

So I just bought a 2015 Air last weekend and everythings been good since, except I've noticed that whenever I pick it up or set it down on something to use it, the casing creaks. I turned it on its side and noticed that the bottom cover/backplate has some give to it and pushes in slightly as though one of the screws is lose. Is this normal or should I go to the Apple Store to get it tightened?

I've been reading about this on other sites and it seems people have the issue a lot with the rMBP and some people say tightening it is bad or it will just get lose again over time.

Thanks!

 

So I went to the Apple Store and they took it into the back and tried to tighten it and reseat the back plate but the creaking still occurred.

They told me I could either return it to where I bought it from (Best Buy) or give them 4-6 days to remove each component in the computer to try to find out which is causing the issue, so obviously I'll be heading to Best Buy to exchange it.