Hi George,
I just happened to stumble over this thread when I was here posting something else.
As it happens – I’ve just had the same experience of ‘save comp as project’ overwriting a file.
I think it was a due to some comp names I was processing having an illegal Windows file name character – ie any one of: < > : ” / | ? *
I think I had a “/” in a comp name.
I’m going to try and run a brief test today and report back to the author.
Mike