First of all: "misrepresentation" is a word tossed around a lot. Just unknowingly making some mistake in a form is NOT misrepresentation. It's just that, an error. So no need to be worried about that unlesss you in fact intentionally withhold information or state wrong facts.
Now about your question: Let's assume you lived in Wakanda (because Black Panther is an awesome movie, but that's a different story
)
Immigration status is more than "just a visa". If, say, you got a visa to visit a country for five days or something, it's not to be listed here. It is as it is with most things in these forms: There is no clear black and white category (even the definition of "having lived somewhere" which is relevant for many questions on the form is unclear). What I'm saying is: Make sure that the officer has a clear picture of what you have been up to, in whatever way you seem fit.
Since you lived in Wakanda for quite a while, I would list it as a status in question 12. This is the reasonable thing to do since you actually lived there for a while. List your status as "Visitor" since that's what you had according to your details. Then attach a (short!) explantion to the application just clarifying that you were living there on visitor status since you never worked or studied there.
It seems that while you were living in Wakanda you also visited some other countries. It seems that you didn't really live there, just got a visitor visa to say "hello". I would not list those. Just visiting a country for a bit is not relevant for that question.
There is one
certain misunderstanding that you are making: The question asks you for status in a country, not for the visas. So if you had, say, ten consecutive visas for a single country (re-re-re-new), you don't have to list them separately. You simply had a specific status in that country for that whole period. Let me give you an analogy: If they asked for your citizenship, would you list every single passport that you ever had? Of course not. You would list the citizenship as a single entry.
So, assuming you lived in Wakanda continuously for 2 years, there should be a single line in your form for Wakanda.
About your section question: Why do they ask this stuff? The same reason why the ask all the other stuff, they want to look at your file and understand if your background story "checks out". Does your address history match your immigration and work history and so on? For example, say you listed that you worked in South Africa for a year in the last five years, but you are neither a SA citizen nor do you list an immigration status in SA, something is weird about your file.
It is a recurring theme for all things immigration: It is hard to make up a consistent story, but it is easy to answer detailed questions about a a true story. It's the same effect when, at the border, an officer asks you seemingly unimportant detailed questions. If you say "I'm visiting a friend" at the border and the officer asks you "how do you know that friend", you should be able to answer immediately. If you need to think for a while, it seems like you are making up a story, if you know what I mean. Detailed questions reveal the liar
Also, I really do not think that you need an immigration lawyer. Even for PR, it usually is overkill. But citizenship is such a straightforward process, it would IMHO be a complete waste of money to employ a lawyer unless you have a very peculiar case (e.g. if you got PR as a refugee but then went back to the country you saught refuge from or stuff).
Most importantly, of course, I am not a professional, I'm just someone with a thing for government forms and some decent experience. So in the end, you have to make the call. If you feel more comfortable listing all 20 items on a separate sheet, I don't think there is anything wrong with that either. I just think it's more than what they are asking of you.
