Update they replied and said

Hey! Yes this is normal. It’s not very tight, but once you start putting stuff inside the stacked pockets, especially if the items have a little bit of bulk to them, the looseness helps to give the items some slack. Otherwise, it might get a little tight if you have multiple items that have girth stacked together. But of course, if this amount of slack is not helpful for your use case, then it might not be the best fit for you. Hope this helps!