So, it looks like this ruined the top line total for percentages (rates,
not percentage of total) - there's no longer the option to average, just
sum or "Grand Total" so if I have 2 segments in my table and CTR as a
metric column, the total is either CTR 1 + CTR 2 or total CTR based on
the entire available dataset. I want the average CTR of the segments in
the table.