Firstly, avoid link networks at all cost as these will come back and bite you hard at some point.
Because everything is still being found by Google, I would say this is the algorithm at work.
When you say you have spun articles, unless this has been done to read as a completely unique article, and not just changing a few phrases around, then you will be OK - However, Spun content needs to be of the highest quality so that if you put the two articles net to each other, neither would look like a spun version of the other.
My worry might be that you are being too active in trying to get links back from the wrong places. For example, if you have a news article on a new development for cars, then this article should be discussed only in car forums and blogs. You will be also seen by others who have a genuine interest in what you are saying.
If you have been hit by Panda, it can take many weeks to be re-crawled again, so don't expect fast changes.
Regards,
Andy