technical difficulties

I am having some technical difficulties with the blog, and was wondering if anyone else has ever experienced the same thing. The formatting and spacing on my last 2 posts is all messed up. When I type it, everything looks fine. Then, when I go to publish, it gets all out of whack. If I edit it back the right way, it gets all crazy looking again when I publish. Hmmmmm.... I hope I can figure it out soon because I don't like it looking all crazy! :) Anyone have any suggestions???