Weird node duplications in views displays?

This is an odd one... I managed to import the WordPress blog OK. I successfully used pathauto AFTER the import to set the URLs for the blog entries to match the wordpress pattern so no redirects necessary.

So far so good.

But then I decided I needed to go into the individual nodes and do some tweaking, as some of the formatting came through and looked weird.

Now whenever I do a tweak and save, any views display of the blog entries, creates duplicates, as if every edit is creating a new node. However, on the list at admin/content there is only one copy of the item.

(This link will not work after we go live on this, but should be good for the next week or so: http://emeraldglasses.com/blog)

Thank you for any ideas you might have on this weirdness.
It may not even be a WordPress Migrate Problem...