Couple things could be going on. If your blade clamps use set screws/thumb screws, first check the set screw to make sure it's threaded in past the inside wall of the clamp. If the set screw has backed into the clamp body, then the thumb screw will push the blade into the screw hole and kink the blade.
The other thing that causes that is if the blade isn't resting flat between the set & thumbscrew, it will kink when the thumbscrew is tightened. In other words, if the set & thumbscrews meet on a section of blade that is not flat between them, the thumbscrew will try to flatten it, often causing the hockey stock affect, if the blade stays in the clamp at all. This can be especially problematic in the bottom clamp, where you can't see it as easily. To solve this problem, I suggest taking two pairs of small needle nose pliers and untwist the ends of the blades until you have flat ends that are parallel to each other. In my experience, this works much better with Flying Dutchman blades than with Olson. When I tried it with the Olson blades, they broke, more often than not. the FD blades untwist pretty readily. Flat end blades are great and easier to work with, not they aren't available in all the sizes. I needed some #2/0 and #3/0 spirals and only FD had them that small, but they didn't have flat ends. They did untwist nicely though.
Good luck and have fun making sawdust!