Double Result on Count Element Calculation

[panca]

Hello
Why result of count element calculation is double result like this screenshoot, how to fix this.
I use the drop down element with count calculation.
is this a bug?

 

[troester]

Is your list set to "grouped by"?

 

[panca]

Is your list set to "grouped by"?

No is not grouped by.
But my list have repeated group element