Question about ActiveX 3.1 & Powerpoint

I have 2 ActiveX windows/boxes on a single slide and have 2 different structures in each one.  I need to be able to rotate and work with each separately.  When I work with one of the proteins, the protein in the other ActiveX window "disappears".  In order to get it to "reappear" I have to right click in the 2nd window and select "Fit to screen".  That brings-up the 2nd image and I can work with it, but the protein in the first ActiveX window then "disappears".

I don't seem to be able to have both visible.  Am I doing something wrong or is there a way to correct this?