When I start a sprint I get not only ongoing but also all closed tasks updated with the sprint.

[Helle Kærsgaard Andersen]

I want to calculate exactly how many hours spent in the ongoing sprint. I try to isolate the tasks in this sprint from the rest, but I find that alle closed tasks from earlier are included also as the sprint names are updated for alle the sprints.

What have we done wrong (when we start a new sprint, when we have cloned tasks etc.) ?

Is there any workaround that we can implement ?