RE: How to change direction of seismic load in STAAD Pro?

That was my initial assumption too. But applying a negative factor for the Seismic L/C in the Load Comb only negates the results of the Seismic L/C, I'd expect that the Load Comb 100's deflection would just be the opposite direction of Load Comb 101's Deflection along the X-Axis, but no, it also negated the deflection of the horizontal beam, I know I just could use the negative Y reaction in Load Comb 101 and pair it with Load Comb 100 to provide the tension-compression couple forces, but my real problem is this...

What if the frame of my structure is assymetrical? and Locating the Point of Rotation of the structure would be difficult, How would I know which column would be in tension, and which would be in compression?

Also I've tried Modeling a simple frame with induced failure in the member to have a predictable outcome, and the result was not as I expected, if you change one column to a smaller section, you'd expect the structure to deflect that way, but that was not the case, the deflection would always go to the positive X-axis regardless which column was smaller.