Presently (Solidworks 2010 SP2) the "type of projestion" is set as a sheet property. this allows for a multisheet drawing to have sheets with diferent settings of Projection type.
Try to move a projeted view from one sheet to an other that has this property set diferently. - the move is permited.
The moved view will have a new projected direction !
There sould not be allowed to have diferent setings of projection type in the same document.
Please give me an example where this would be justified.