Does anyone else think that the portal gun doesn't actually 'shoot' portals, but instead it exists solely to make the humans job of placing portals easier?
EG, the device either can't actually place portals, or doesn't shoot them, but instead is only used to humans can place portals.
Notice how in portal one GLaDOS places numerous portals without actually shooting them, the VERY first room, when you leave your cell, later on again and again before you get the full device...
She also mentions how you shouldn't take it out of the testing area because of asdajlhsdakclh. Maybe the device doesn't function on its own? Maybe it needs a connection to aperture or GLaDOS herself so that she can place the portals.
What I'm saying is maybe the portal gun only augments placing portals.
Any ideas?