The quick clamp should be held tight in the top holder. the regular clamp should move some in the top holder
"Use the QuickClamp instead of a standard blade clamp at the upper end of your sawblade, and align your blade instantly! A positive stop helps you put your blade in the same position every time, and the easy-grip knurled aluminum knob places pressure directly on the blade for slip-free tightening. Unlike the standard HEGNER blade clamp, the QuickClamp is designed to be locked into place in the upper arm of your HEGNER saw at all times. And since it doesn't require a wrench, it's super-fast to release and re-tighten for speedy blade changes, especially for frequent inside cuts! The QuickClamp is supplied complete as shown, and accepts all blade sizes."
When I first got my Hegner, I broke a lot of blades. But when I got used to it and the tension. that went away. I rarely break blades anymore. I have never used any of Advance Machinery blades, so I can not speak for them. I will add I purchased a used Hawk a few months ago. The same problem, was breaking blades. But after getting a feel for the tension on that saw, that went away.