Can Anyone Help Me With A Blogspot Problem?

I am having a technical problem with my blog, and I cannot find anyone at Blogspot to contact for help. All of a sudden, I've lost the ability to use the "enter" key to insert a line space between paragraphs. I've never had this problem before. When I press "enter", a line space appears on my posting page, but after I publish the blog, there's no line space where I had inserted one. For example, I inserted a line space before this sentence, but it doesn't show up on the blog. Can anyone help me with this? Please leave help comments in the "comments" section. And why is there no one at Blogspot to offer help?