I made a 3.75" diameter circle and then put more circles inside, each one
0.25" smaller in diameter all the way down to 1.25". Then I drew angle lines
across the diameter of the largest circle, every 7.5 degrees, all around the
circle. I made little rectangles 5mm X 2mm in size and placed them along the
bottom half of the circle where each of the angle lines and the 3.5" circle
intersect (Each of the small rectangles was also rotated to the same angle as
the previously drawn lines that span the diameter of the circles).

I then selected the rectangles on the bottom half of the circle and copied
them. I pasted a copy of the rectangles and grouped them. Then I flipped the
group vertically. When I tried to align the group of rectangles to the top
half of the circle, I found that the little rectangles are out of alignment
and are not where the angle lines and 3.5" diameter circle intersect.

is this a bug? or did I do something wrong.