Hey, Bloggers? Why won't Blogspot format paragraphs?

So, it has been a while since I blogged. I remember using my blog to work on my essay writing. Then, something happened to blogger. All of a sudden, it crammed all of my sentences into one chunk, and the paragraphs disappeared. This is one reason I quit using the blog to write. So, what happened? Does anyone know why this happens? The previous post was written in paragraph format, looked like it was paragraphed, and yet, when it was published, it is a globbed together mess. What's going on with blogger that it does this?