Just got my 154CM EDC a few day ago. I love the knife except for one thing. When I open the blade the locking bar moves over about half the thickness of the blade but the bade is loose and rattles if I shake the knife. If I then force the locking bar all the way over the lockup is fine. I am wondering if it is designed to work like this. Do they all require this second motion to get a tight lockup?