A quick look at the page source leads me to believe that you’re using the rich text editor to post. There’s a lot of garbage in there.
But yet no line break tags….
I would try turning off the Rich Text editor, at least for posting the poems. You can do this at Dashboard -> Users -> Your Profile -> Bottom of the page. You’ll have more control over your posting if you do so.
Also you may even want to try posting your poems with blockquote tags. Some people prefer teh layout depending on the theme. I think it’s a personal choice myself.