automatically adjusting month as columns

[#1]

I have a rolling date range starting January 2019 until last month and every new month it gets automatically another month included.

I have created a freeform where visits are the rows and colums I drag the dimension month in it and it woul show me January until June. But when another new month gets into this custom date range this Freefrom is not automatically including this date range and I think this would make it much easier to work with Adobe. Because it is actually just the same when I would include month as rows and this always automatically changes so why not when only switching row to columns?