yes, BCP GPA and sGPA are two separate calculations.
intro psychology should be non-science, if i remember correctly from the AADSAS website that explained how to classify your classes. intro nutrition is either science or other science; at my undergrad, nutrition was offered by the nutritional sciences dept under life sciences and would be counted as biology.
ok, let me clarify about the intro psych thing. where i went to undergrad in canada, intro psych was considered a science class by my school. however, i know that at most other schools, intro psych was considered non-science. so there appears to be no set rule regarding this although AADSAS seems to view psych as non-science (unless it is cross-linked with more biology-related stuff like neurology and neurons or what not).