Yeah, what I meant was that there are some majors with more than one compulsory level 1 unit. So for accounting, you also have to do financial accounting, which has AFC1000 as a prerequisite. That's the only example I can give, because the page stops listing compulsory units for majors after that (they just start saying x, min of 8 units offered by the department of x), but there are certain units that form prerequistes for further study in a given field. For something like marketing, the other unit is already part of the compulsory six, but if I want to do something like accounting or economics, I'll have to be more careful, I think.
These are the the units you get to choose from, btw. (4 level 1, 1 level 2, so you were right)
* AFC1030 Introduction to financial accounting, or AFC2140 Corporate finance
* ECC1100 Principles of macroeconomics
* ETC1010 Data modelling and computing
* MGC1020 Organisations: contexts and strategies