How do I stop unwanted custom movement results

Hey all. I have custom movement set up but I have an issue I want to get rid of. When I hold down W or S and also A or D then the animation stops and the player just slides up or down the screen. Is there some thing I am missing to stop this from happening?

You probably want do do something like if W and D are down simulate movement (choose either right, down or both if using 8 directions instead of 4), and set animation to back.