Loss of vertical space between paragraphs

This started a couple weeks ago. I usually have to change the vertical paragraph spacing from double space to single after I paste reviews into our Word Press site. Then if I find a further error – such as a word that should be italicized, or perhaps I left off the Amazon number – and I return to the Edit Post page in WP, it has run together all of the paragraphs and I need to bring out the original review again and hit the Return button many times to set up all the vertical spaces yet again. I just had to do that three times on a review of 3 CDs at once. There is a bold in one review I must get rid of, but trying to do that will lose all the paragraph spacing.

The odd thing is that if a writer sends me an email with a small correction to make on a published review and I go to edit the article in WP, it is then OK and all I need do is make the one correction. Perhaps this started with our update to WP… Can this be corrected? My webmaster cannot help me.

You will not see the problem at my site – audaud.com – because I have corrected all of them. I don’t see a way to include a screen shot attachment.
/Users/SunierHome/Desktop/Screen Shot 2014-07-20 at 9.36.01 PM.jpg