"My thigh is at an angle of 45 degrees along with my shin and the angle that my foot is from the floor. My heels lower and at the same time or thereabouts my shin and thigh will reach the 45 degrees. My body stays as it started verticle. There will be no nodding or bending forward from the waist."
No one said anything about bending FORWARD.
However, if your standing thigh is at a 45 degree angle and your torose is vertical, then it is quite obvious that there must be a 45 degree angle of bend in the vicinity of your standing hip.
If you would take a more careful look at the picture of the lady in forward walk #2, you would see that she does not have such a bend, because her THIGH is nearly VERTICAL.
She is doing it properly and projecting her weight past her foot as a result. Whears you have this mistaken extra bend at your hip, because you refuse to commit your weight forward into the movement.