Percentages exceed 100%

[rviscomi]

It's possible to break the dashboard in such a way that the percentages exceed 100%.

You may see this on the y-axis of the chart or a % column of the data table:

The reason why this happens is because some controls are meant to always have exactly one value selected, but Data Studio only has a mechanism in place to prevent 2+ values from being selected and not 0 values. So for example you can deselect the "Client" or "Geo" controls and cause the dashboard to think that all values should be selected at the same time, which causes their percentages to get aggregated together.

I'd love for this to be fixed in Data Studio itself so that the controls can behave more like a radio button, where users are unable to deselect an option that is already selected by default, only change its value. Until then, I'll look for a workaround and leave this issue open to hopefully explain the unexpected behavior.

Solution: check the filters/controls on the Technology and Settings pages to ensure that "Client" is always either desktop or mobile and "Geo" has at least one value selected (default "ALL").