I have just played some more and looked at your gameplay videos. you look like you are in the ground too, I think I am just shorter than you, that might be the issue, may I suggest a setting that offsets you from the ground?
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Maybe I don't understand what you mean by "in the ground". I can put my controller on the ground in real-life and it matches up with the game. I usually test while sitting on the floor, I rarely play standing up. When I played well sitting on the couch, the floor seemed higher.
Do you start the game while standing? Maybe the game engine is setting the height default on it's own?