A great post over at Revitdialog has unlocked this mystery for us.  Just a little addition to that post – I think it is important to tile your windows first, then do the ordering process.  In other words:

  1. View – Tile
  2. Here you have your currently ‘open’ views in Revit – now, use the Revitdialog tip to re-order them (clicking them in reverse order, finishing at the view you want in the top-left)
  3. Then hit View – Tile again.

 To get the right order you have to work backwards, so if you have 5 panes, you start with picking for the 5th position and work backwards – 4, 3, 2, then 1. However, Revit places the panes in ascending order – meaning the views get placed starting at 1 and goes to 5.

Read more and see the handy pictures at:
Solving the Tiling Mystery