When I try and drag the part (the header) downwards in FZ, it seems to want to move in 1 grid square (0.1") units. So when I drag it down … even by the smallest amount, it seems to jump a whole grid square and I am no better off. I can’t seem to move it a fraction of a square. I’m at a loss to explain, the part just seems to be “off” by 1/2. I should have mentioned that the part (exhibiting the problem) is available on github here … if you’d like to try it yourself and see if you see the same results, that would be fantastic…
https://github.com/adafruit/Fritzing-Library/blob/master/parts/Cobbler%20Plus.fzpz