Yes your headers fixed

, at least the OP is doing something, how many are sitting back hoping a miracle cure gets posted to save them doing any testing themselves.If he has affil links etc on the site, so what , let's be honest plenty here doing the same.
Anyway onward, to what is going on you need multiple sites using various methods, it makes sense, testing one site will take months by which time we'll be on penguin 2.1.0 . I see the usual methos working, is it because the update only affected sites in a given period of time, shuffled the serps around then it all starts again , I don't have that answer ..yet. I am constantly testing, you have to. I will say don't pack your tools or shifty techniques away yet . Ask yourself a simple question, what does google really want, I think they want as many spammy urls as possible, what do I see getting mentioned in every 2.1 thread, ah the disavow tool. Google cannot fight spam without your help, what they can do is simply turn up the dial on authority sites and make you think more has happened than actually has. Then when you ditch all your links they turn the dial back down, job done you've lost alot of links and may have to start again. Hummingbird is a different kettle of fish, it may be in some way connected ,poss based on anchor etc, it was separate update though.
Anyway I wish everyone well with their sites and don't let G grind you down. Consider the resources G has at their disposal, yet they still cannot win. Shoulders back, head high, you're a blackhatter, never say die!