Hi all! I just made this purchase and I have the same problem. I should have looked at the item properly at the store..
Mine is MIF as well.
I don't get it though. The gap at the end of the zip (NOT the part where the chain comes out) makes it super annoying when I have to zip close because I need to hold the end down. Or else it will not zip smoothly because the cloth at the gap will flip slightly due to the pressure.
So this 0.5cm gap is normal? How big is the gap on your key cles?
I think its normal. Mine also has that gap.