Recount is a damage meter and combat log addon which is still in development.
"Damage Taken", "Healing Taken" and group damage summaries are not available or displayed more detailed due to the restrictions in the Addon-API.
Several options can be configured in the ingame settings menu. Press the "M" button in the top right corner of the Addon to switch between reports. Press the "R" button in the top right corner to reset the collected data.