This has happened the two times I used the 'New Post' tab on WordPress.com: http://wordpress.com/#!/post/
When I write the post and then publish it, wordpress is generating what appears to be separate copies of each version. So, I will have the 1 published post and then 15-20 other posts in 'draft' mode.
This is definitely a repeatable bug. I can send screen shots if that will help.
The blog I need help with is cinhosa.wordpress.com.