Again, I googled the s**t out of this, but cant find any similar problems, only thing I managed to find is this:
There's a a mention of crashing Maya when changing to 4-view and that being fixed in Maya 2014. Yet, i don't experience crashes, only changing of cameras in Maya 2012. I would like to find out is there any other solution besides buying Maya 2014 or another gfx card.
EDIT: I think I managed to solve this! I tried importing the existing scene into a new scene and the ortographic cameras are back to normal in 4-view
EDIT2: It seems it's got something to do with the view cube..i manage to reproduce the thing with the views yet again when using the view cube. Now I imported the already imported scene into a new scene. The views are OK again, but it's a mess in the outliner now