some feeds duplicate content

I'm confused. We're feeding a filtered friends_timeline from one Twitter user to another. Some (not all) of the messages are duplicated The message isn't _fed_ twice. The message text is duplicated in one feed.

example:
nuddlegg: Vicki, thanks for this tricky TWiki twitter trick :): nuddlegg: Vicki, thanks for this tri.. http://tinyurl.com/4j48rq

One 52 character message, repeated, with a tinyurl (which if you follow you'll see the original)

This doesn't happen every time and it's really confusing me.

Here's a screenshot of the twitterfeed configuration: http://screencast.com/t/y4M7HZqAhxQ

we're posting to @twikifriends. The friends_timeline comes from @twikiorg.
 
silly
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