We just began using Visual Studio Online to help us manage our sprints.
Our sprint started today, the 27th Jan. We had our Sprint Planning in the morning, where we committed backlog items to our sprint.
The burndown chart looked like this after Sprint Planning:

It must be confused because the sprint actually started before we began adding items.
Is it not possible to specify a time for the sprint start?
We cannot start it from tomorrow the 28th, because work would have begun after Sprint Planning on the 27th.