Question Animeation and animator, glitch, read value

Hello, I have an animation with broken root position (half body is underground), so I have changed each frame position manually and it looks fine when I scroll it in animation window, but when I play it in animation window or in game, the jerking glitch appears in the middle, ...why? cant get it...

Second problem is animator, I'm setting float for speed, and when speed is less then 0.1f animator is recognizing it as 0.1f but it less, something like 0.07 or so. this breaks my setup. Is there a solution without multiplication or similar stuff?