How do I disable Animation blending?

Within the character model is a script called "Animation". Within this script, Roblox decided that it would be a really swell idea to add something called an animation blender which basically takes walking and running and mashes them together. This is not noticeable in most Roblox games. It IS noticeable if you put in your OWN animations. It makes them jittery and resets them constantly while you're moving. I'm not sure how to get around this issue in the script.

Has anyone experimented with this and if so, can you explain how you got rid of the blending feature without harming other animation mechanics? Any help is greatly appreciated.