Because there was some html code embedded in the text yet the poster did not insure that the whole post was html coded.
That mushes everything together.
I stand guilty of not observing good form and style. I simply did not use paragraphs. Blame me and not the text editor or the website from which it comes. There was no fail. As deks points out, in the articles I have previously posted(the ones where I simply copy the articles of others to the editor) the links, fonts, and yes paragraphs all show up as they should.