Wow thats really low for so many impressions. It must be something to do with your niche or you must have incredibly low CTR's.
Facebook is my 3rd leading traffic driver- is there a problem with getting traffic from social sites vs other areas?
Those numbers sound about accurate. Mine yesterday was 13euro for 15,000 page impressions, which is about US$1 per 1000. I think it has always averaged out at about that number. You can use the competitor filter to remove certain ads though. Sometimes I notice a single spammy ad appears on every single page of my site . . . the click-through rate and earning per click plunges dramatically until it is removed.