When I clone my camera I get the black bars on the side for the clone which is different that your experience. I assume you are using a different 180 camera so I wonder if something there is the issue.
I was running a 2 year old version of BI and I just updated and both versions do the same thing.
I am using the EmpireTech IPC-Color4K-T180 camera, Here is what I get with the second clone in my layout, the primary is MyCAM10 and the clone is MyCam11, as you can see they are identical and no black bars!