Hi markdd,
please accept my apology for replying that late, and thank you for your kind support and answer! I have double checked what you've said in the first place but couldn't find any misaligned body part. So your second message does make more sense to me. Do you know if this is a known and official Vectorworks bug which will be fixed in the near future? What would be the appropriate Vectorworks contact to get an answer on this if you doesn't know?
I just don't want to guess when focusing a fixture. I also don't want to rerender my drawing every time I've adjusted one single shutter (and I have loads to focus!) It might be not a huge issue when you do a rough-and-about focus to test something, but it becomes very time consuming (and annoying, compare to the investment people have to spend for the software) when you want to produce a first class rendering for your client where guessing is not an option. I might don't see or understand the bigger picture (I really don't) but it would be ever so great to get a profund and official answers.
Thanks again for your support!