Grid Floor Axis Not Aligned With Zero? I am having a problem with a vertex that I move to 0 along the x axis, but it is not appearing to be on the axis like it should.

See the screenshot below. I am in top view, and the selected vertex is clearly set to 0 in the in the transform tab. However, it appears at all angles to be to the left of the grid floor which it should be on top of.
You have the Local button selected, which means it starts the coordinate system at the object origin, not the world center. 
Set it to Global and it will work like you want, where 0 is at the grid floor.