Since you're new:

1. A flag IS a down vote. (Whoever flagged your post is the same person who down voted it, its the same thing)
2. The @cheetah account is a set of "Good Bot's" that find plagiarism, etc.
3. If you want to copy/paste someone else's stuff, use proper citations. (Use the 'Link' button when writing an article.)

Someone probably just didn't like your article. Its not a big deal unless you have dozens of flags.