Yes if it goes ten and then is blown back and lands before the ten meter line then the game carries on. Same thing for a kick at goal, if it goes between the posts and above the crossbar but then gets blown back the goal is valid. There is no mention of needing to touch the ground or something beyond these two lines in the law book.
From the moment your upper torso hits the ground first it will be deemed illegal.and hips horizontal and legs/feet above the waist line will be considered a tip tackle and therefore sanctioned by a card. That's just the way it is. You have to imagine that the law makers are trying to set up laws that can be applied to pros as well as amateurs. If an amateur did the same tackle it would be far more dangerous hence the rationale behind trying to eradicate this type of tackle... Lots of people think it takes stuff away from the game - maybe so - but it's the direction that it's going. Hope this clarified a little