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In blog module there is something strange diplayed, may be i'm missing some settings - but it shows facebook like button at the bottom of post and also it has strange url to post itself but title of this link is blogpost author name (email).
this all happends if in Excerpt Mode Settings the UseExcerptInFeedSetting is set to false so rss shows full post and strange footer in a post.
In Blog settings see
Feed Settings > Add Signature to Feed
Social Settings > Add Facebook Like Button to Feed
Hope that helps,