Yourself / Yourselves

[jack]

http://learnline.cdu.edu.au/studyski...a_pro_ref.html
I did some research for reflexive pronouns but I don't get how they work:

http://www.google.ca/search?hl=en&q=...selves%22&meta=

Are these correct? What do they mean?
1. We're going to save you from yourselves. (What is the subject and verb here? How come it isn't 'yourself'? )
2. We're going to save you people from yourselves. (If #1 is correct, why? How come it isn't 'you people' for #1?)

3. We are going to save you from yourself.
4. We are going to save you from yourselves.

5. You should take care of the matter yourselves.
6. You should take care of the matter yourself.

7. You (people) should all watch out for yourselves. (How come I don't need 'people' in here for 'yourselves'?)

What do these mean? For the sentence way above, which one should I use?
8. But I don't get how they work:
9. But I don't get how these work:

Thanks.

[Tdol]

We're going to save you from yourself. (one person)
We're going to save you from yourselves. (more than one person)

You don't need 'people' in #7 because it's obvious that you are talking to people.