Could this all be a symptom that the strings are sitting too high at the nut?I notice on a couple of my other guitars that when I fret a note, say at ...

That's exactly it - the ghost tone is the note that sounds between the fretted note and the nutIt is rather frustrating to hear, of course.Much louder...

It depends on where I am hammering on the open string. If I am hammering lower on the neck near the nut (below the 12th fret), the "ghost" tone that s...