What do you mean by "do less of"?You normally overload in the subject that you do less of. Normal the second half of your degree title, so I'd guess Sci.
I did that my first 2 semester but with the type of subjects/majors i want to take the times (ie some subjects are only offered in specific semesters) it wont work out unless I do an Even 2-2 split.Double degrees normally break into 3 subjects from one degree, 1 subject from the other. When you overload, it becomes 3 from one, 2 from the other.
Yeah i think its along those lines.i think you enrol in four courses first, and then for the remaining course, contact that course's faculty and ask them to enrol you manually.