MAX MIN based on Multiple dimension
That's an expected behavior of Anaplan, as mentioned in https://help.anaplan.com/c5c1e687-3d55-46ea-ab28-a7603eade586-x[MIN:y]
You will see the following when you scroll down.
Having said that, what exactly are you trying to achieve. It'll help the forum members to come up with a suggestion if you create a mockup in excel and attach relevant screen shots.