Blogger.com Frustration

I am not all that super-savy when it comes to publishing a blog. I mean I have all the basics down, and when I want to try something 'fancy' (and actually have the energy to do so) I can usually figure it out.

But here is the problem, I write my posts and they look great. Then I publish them and the blank lines in between the paragraphs dissapear...but not all of them. I have even edited in html and sometimes that works but it is inconsistent. What am I doing wrong? Or is blogger playing Jedi mind tricks on me?

If anyone knows of what I am doing wrong, please let me know...