We built a segment that has a couple conditions (drives and training),
and we want to measure unique visitors, spanning multiple months (e.g.
September - December 2018). It is possible for a drive or training to
occur in 1 month, then driving or training to occur in subsequent
months.When we run the report each month, we expand the workspace date
range and notice that historical data has changed. Once segment criteria
is met, does the unique visitor count get applied to the original month