Permalinks issue?

I recently added a new home page and the permalinks picked up the title of the page in the link (of course)

http://www.all-about-moving.info/2011.03/household-moving-the-smart-way

I found it necessary to delete the page and I re-wrote it using the same title, and then got the page title twice:

http://all-about-moving.info/2011/03/household-moving-the-smart-way/household-moving-the-smart-way/

I tried deleting the page and giving it a new title but the “twice” is still there. What did I do? How do I get rid of it? Since making this change, I have been unable to create a Google XML sitemap and I’m afraid I have somehow corrupted my file structure.

Thanks in advance for your help.