I don't know what you mean by "Use MAJ to run". I can't see any events that might relate to that step. I also can't see anything shaking. It changes quickly if you tap the movement keys quickly, but that appears to be the correct playback of animations as you have it set up.
I'm not sure precisely when you mean by "shaking a bit at the start". At the start of what? Please remember to be exact and thorough in your bug report descriptions.