I didn't say it was the same. I just said that the subjects in BComputing are equivalent to the ones that are covered in the BScIT, as you may have realised. There are extra subjects in the BScIT of course, and thats why its a good single IT degree on its own.
The BComputing includes the one IT elective subject because you may need to do an extra subject to do your IT sub-major. Eg. You need Dist. Comp. Architecture for the Internet Business Tech. sub-major, you need Data Structs. and Proc. Prog. for the Computer Graphics sub-major, and you need Networking 2 for the Internetworking sub-major.
With that said, I'm not sure why the handbook mentions that you can't do the Internetworking sub-major, coz if there are spaces available, then I think you can do it. I think its only because its quite a popular sub-major, but if you really wanted to do it, you probably could.
So in other words, you'll probably end up doing one of the other core subjects anyways, which just leaves you with a few that you haven't covered.