I just got a 2014 Macbook air open box from Microcenter. I have a couple of questions. It is the 11.6 model. One why does the screen seem more pixelated the dimmer it is? Second there seems to be a dark strip close to the very top and very bottom. Is this normal? Could just be that I have gotten used to retina screens but I needed a small laptop for school and this seems perfect just wondering about these things.