If you test in a different User account on the machine, does it behave differently?

Does starting your computer into Safe Mode change anything?

Is the printer networked (or accessible from a different computer)?
If so, does the other computer act the same way?



> So I'm reduced to creating a new document for each sheet I scan

So you're saying that at the 1st. "it asks if I want to add additional pages" prompt, you reply, No?


It appears you are loading single pages at a time?
So you're scanning from the glass, rather then through the feeder?