PAGE and POST problems. HELP!

When I post anything on my blog or add content to a page it ignores all paragraphs, bold, headers and styles I apply to my posts and posts it in one large paragraph with no breaks, bolding or header styles. It does the same when I try manually styling the text with the html option.

I don’t understand this.

My blog is ran off my own server, and does the same thing on all templates I use- even the original/default templates from word press. So, I do not think it is my templates.

Does anyone have any ideas????