I have a 42mm Space Gray Apple Watch Sport with Black Sport Band. I've noticed that the band is slightly loose on both sides. What I mean by that is that when the watch is not on my wrist, I can subtly move the bands around a little bit inside the enclosure. We're talking millimeters here, so there's no worry about it falling out or anything, but I *do* feel it. Is this normal with all sport bands, or is mine abnormal? Thanks!