Sorry. It must have been too late last night for me to type in complete sentences.
I string my 12 strings with a paired G: that is, instead of tuning the 6th string an octave higher than the 5th string as is more usually done, I use two identical strings, and tune them both to the same pitch (similar to the 1st & 2nd string, and 3rd & 4th string pairs).
The story, which would be a lot better if I could remember the name of the song, has to do with playing a short A chord (strings 2, 3, & 4 at the second fret -- in regular tuning on a six string) on a twelve string which gives you, on the 6th string, if it is an octave above the 5th, the same pitch that you would get from playing a long A chord (1st string at the 5th fret, strings 2,3,4 at the second fret) on a six string. On the six string, to get that pitch, you have to give up your open first string E . . .
I hope this made sense. Not sure that it is worth caring about, and probably constitutes a veer.