I get around this silly "feature" by always identifying my paper sizes as horizontal x vertical, and always keeping the driver set to portrait. I have a 24" x 30", and a 30" x 20", for instance. It is quite simple, and then again, a little ridiculous that we need to create a work around for something so basic. Once again, I love the prints I get, so a little head scratching aggravation is livable, here and there.
-Ron H.