I have a project setup using the SCRUM template. When I start a new sprint with all tickets given an estimate (we are using ideal days for estimation), the estimation gets copied over to the original estimate field which is all good. However, when I then go to the burndown chart I see that the blue line has gone up, and as I resolve the tickets in the sprint that additional effort never gets wiped out.
For example in this test project I have created a sprint with some dummy tickets totalling 10 days of effort. When I started the sprint, the remaining effort shown in the burndown went up from 10.0 to 12.0. I then resolved every ticket in the sprint and the line dropped by the amount shown on the ticket yet I'm still left with a 2.0 day gap.
Here is the state of the agile board:
and this is what the burndown chart shows:
Because the burndown is based on historical changes you don't see the initial upwards spike, but as you can see although all tickets are completed, the blue line doesn't go down to 0.0!
Can anyone suggest why I'm seeing this?