Chem3D problem with the structure of molecules

Hello everybody. I am having a problem rendering the structures of molecules like buckminsterfullerene and hemocyanin. Here is the screenshot: http://www.tiikoni.com/tis/view/?id=3caae41

I also have a false display of the double bonds in allenes (C=C=C) (instead of the double bonds being perpendicular to each other, they are parallel).

How can I change that?

With best regards,

Philipp Macher