If the column and wall share the same plan location (column centroid, wall CL), then they always move together. When there is a step in a roof where one beam is higher and another is lower, supported at the same point, then two stories are always required to model that situation (though it may not be worth it in this case). If the column is moved off the wall CL, then it can be adjusted independently, but that opens up other potential framing issues. Our Modeling FAQ has more on this.
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