What I showed in my last entry, is not the same approach you are taking. I was not changing the Axis Column Property. Rather, what I demonstrated was simply going directly to the axis of question, on the Graph Builder output, and right clicking on it, and going to Axis Settings. I would not expect your approach to yield different results, but they might.
I would suggest that you go to the Axis Column Property, and remove it. Then go directly to the Graph Builder Axis, and make the axis changes there. Make sure your column in question has a Data Type as numeric and a Modeling Type of Continuous.
Jim