I can understand your frustration, Bob, but I suppose one of the skills you acquire when learning the guitar is to be able to see notes in more than one place on the fingerboard. You can't always play the open-string B, for instance, because you may be using the second string for another note, or you may need to play a descending slur from the B, or a vibrato, you may be playing higher up the neck and find that the sound of the open string has a different tone from the fretted notes played before and after it. So it's useful at some stage to learn the alternatives to the open string notes, and eventually of course to learn the notes all the way up the fingerboard. It's confusing at first, but it will seem natural in time.
Classical Guitar Forum.
"Experience is something you don't get until just after you need it." - Steven Wright