It seems that only with the acoustic 12-strings, and only sometimes, when I play harmonics on the G, the base note is fine, but the octave up pitches around instead of playing the note.

Do I have just a bum string? Is there an adjustment.

I also notice that that string has more difficulty tuning with my Peterson Strobostomp2, which could be related.

Anybody else? Is there a problem? Or is this just a known ongoing issue?

Also, I notice that upon receiving my JTV59, even though it is the Korean one, I am instantly cooler than everybody else. Is this something I should expect to continue? Should I warn people?