CV with academic transcript
This sounds like a case of the ambivalent comma to me.  In the quote that you provide:


  "Please attach here (in PDF format only) your Curriculum Vitae, which will provide all of your Academic Background and Professional Background information, copies of your academic transcripts, and a Statement of Purpose describing your background and explaining why you feel that this is the right program for you".


it is ambiguous whether it should be interpreted as "Curriculum Vitae (which has your background) and copies of your academic transcripts and a Statement of purpose" or as "your CV should have: academic and professional information and copies of your academic transcripts and a Statement of purpose"

The typical practice would be for an institution to be requesting the second, so I would recommend interpreting it in that manner.  If they allow you to upload only one PDF, just bundle the documents together into one PDF.