Has anyone else seen this? groupcasesensitive is optional, and the default is "yes", so I was surprised when a user reported the tally by country indicated 40 items found but the country breakdown only summed to 36. Turns out we had 13 for Nigeria and 4 for NIGERIA. The report was displaying NIGERIA 13, first label, last value, which I find baffling.
After explicitly adding groupcasesensitive="yes" to that query, everything is as expected- both rows display and the running sub-count now totals to 40.
We are standard license on windows. I'll see if I can replicate in a simple demo and share.