Last night I decided to take some of the bowness out of my T-Bird neck. I was changing a couple of strings and oiling the fret board as well. After I made the adjustment, repalced the strings and tuned the strings all the open strings tune up just fine. However, the A string is now a fret/note off. 1st fret B, 2nd C, 5th E, etc. Is this an intonation problem? If so do you adjust the bridge for longer or shorter strings or is something totally unrelated? The E, D, and G are normal.