duplicate posts from rss

Hi

this is driving me nuts

I got a lot of duplicate posts from some rss feed problems.

The real problem now is even after going through and deleting these posts, when I open manage posts again they are still there. I see many of the same ones and other ones is appears. Some remain deleted but some do not.

3 times now, yet I go back and they are there. it is like haunted, almost.