Or is it me?
I tried and tried and tried to fix the font on my stash report post. Below the ~~~~ line, I highlighted it all and selected the same font, and the same size, and at least on my end after publishing it (and even in preview mode), parts of the post came out with a different size. That's just the way it'll have to be.
Does it look messed up to you? Have you been having problems with Blogger?