It's not clear to me what the y-axis for the maniphest burnup charts are.
My intuitive assumption was that it represented the number of tasks open in a project over time.
For example, the Files chart (https://secure.phabricator.com/maniphest/report/burn/?project=PHID-PROJ-9105babae8e0b9ec1c0e) under this reading would indicate that there are 38 open tasks. The workboard however shows only 27.
Am I misinterpreting the meaning of the chart or is it inaccurate?