Problem with animation transitions on a blend space

so i have this problem, i have a blend space for the animations of a character moving forward, backwards, left and right and on the preview everything looks fine but in game only the forward motion looks smooth, when i try moving left and right it gets very distortioned and as if it were moving forwar on a slight angle to the direction wich i am moving, so if i move to the right while looking forward it looks like i am moving forward with a very slight angle to the right on a very jiggly maner.

hope it is clear enough, please help