I'm guessing you had a plane selected when you went into sketcher...and he had "Auto-rotate view to sketch plane" checked in "Stystem options/Sketch.
Once, possibly - but this is every time I create a new sketch. I had thought along those same lines as well.
Thought I would add a quick update to this post should anybody else have a similar condition.
It turns out that our templates are not pulling from the server, but rather each work-station. What I did was to create a new part> create sketch> and then set the view to isometric. I then exited the sketch which left my view state in that isometric view, and saved the blank part as a template overriding the current one.
Now the planes show as they should when creating a new sketch.