Scorecard chart with CountDistinct returns incorrect results

[ChrisRode]

Hi all

We're using Scorecards to show a Distinct Count of a particular datasource value for "Last Month". What we have found is that it consistently shows a slightly inflated value from what I get if I run the datasource query myself.

This seems to only occur for a count distinct, not for a sum

Any help you can lend would be greatly appreciated