Here's some help.
I didn’t read the whole HTML page but saw no mention there of using source code to post: Use the cursor to highlight text, then right click with you mouse. Then use the cursor again to highlight the source code you want, click copy, and paste the source code into the reply box. Punching “preview” will show you what will post.
Sometimes posting requires more than that, though. And that’s why the web browser I use is Seamonkey. Seamonkey comes with an HTML editor which makes using HTML a whole lot easier.
You seem to have a consistent problem in preserving the paragraphs from the original article.
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I don’t have a consistent problem in preserving anything. I copy and paste exactly from the article. You are the only one complaining. If you don’t like how I post - don’t click on it.