Non-working days being included in Version Report?

On a burndown chart we’ll see a flat line over the non-working days (like weekends). When viewing the Version Report, it appears that the weekends are being included in the forecast for completion?

Is that just a quirk with the visualization or is it actually projecting work on weekends?

We have the same question.
We have also noticed that completion dates are being affected by the weekend. We monitor the completion date Friday end of day and when we verify them again on Monday morning, the completion dates have been pushed farther.