Highly variable results for some sources?

spunko2010 Isle of Man

February 2013 edited February 2013 in Need Help

How would I go about diagnosing why my campaigns are so varied? I created a duplicate of another campaign and changed just the keywords, article text and obviously URL, but the results are markedly different:

350S 180V

3400S 40V

They were run a day apart...

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