Need merged pie chart.

I dont want activities logged at the same time shown as an independent item (like "A, B, C" and "A, C".) It is actually annoying and decreases visibility. List mode can merge these duplicated activities into one but the pie chart cannot. I think there should be an option to disable this. And I would like to hide specific activities from History (especially on the pie chart.)

Ng1r0 about aTimeLogger Time Tracker, v1.5.14