[dkerby]

Ed Z is very correct about the club going to the inside.
In a lesson with Yoda, Lynn explained how posture related
to the below plane inside move on the backswing. The more
slumped over, the more that you are likely to take club inside
on the backswing and the less Hula Hula you will get on the
downswing. I experienced the same problems as you present.
Wedges were hit way inside the center of the clubface. Other
clubs seem to in the center of the cluface. I had my wedges
reduced to 3 degrees flat, but this did not help much. Then
I noticed that if I got rid of the slouch posture that the club
was more upright and more prone to hit in the center of the clubface.

Lynn also had me to focus on a single action takeaway (no rolling
of the clubface) and to trace the plane line, on the takeaway,
with the crook in the right index finger.

As mentioned in previous posts, Lynn has a drill that will help.
Set up with your toes pointed at the target but your shoulders
parallel to the target. You will feel instant coil and take the
club more up on plane rather than under it. From the top, just
turn the hips to the left. If your posture is correct, you should
get the Hula Hula. Next turn your toes only 45 degrees with
shoulder parallel to the target. Then apply the feel obtained
from the first two drills. You should hear a click and get
crisp pitches.

Intersting note: Hogans One Iron in the USGA display, has
a spot about the size of a quater, just inside the hossel of
the clubface.