There is a bug here, where moving a region of several headings down, then up will snag another heading onto the bottom of the region. See the screencast for illustration. To reproduce, in the sample file use Alt-h twich to select the headings 'Select 1' and 'Select 2' together in a region, then press Alt-Down to move them just above the following non-blank heading and then press Alt-Up. That heading will be dragged along upward with the active region.

Thanks!

Philipp