Not blend in Mecanim animations

Is the blending tool on animator states broken or is it just me?

I’m making a low poly game, and I would really like that the animations just didn’t blend at all. But every time I try to set the blend time between two states to 0, the tool glitches out and both of the animations disappear.

Am I not doing this correctly? I really don’t want to go through the hassle of using legacy animations.

Here’s an example of what’s going on.

Imgur Album

its just how mecanim works it doesn’t really matter. The instant your Attacking is true it will blend to mainAttack01