When I'm at home with my SP "docked" in my office, I like to use a full-size keyboard, so the other day I purchased a Bluetooth keyboard and all works well. But there are other locations in my house where I also prefer to use the SP with a full-size keyboard so today I purchased a second Bluetooth keyboard (same brand as the first). Much to my surprise and disappointment, it seems like if it is one other the other that can be paired, but not both! Is this a Windows limitation? Or a SP limitation? Or I really should be able to do it, so the problem is with my keyboard? Thanks!