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Make sure you are not logged into your Google+ account at the time of checking your rankings and also clean your cookies.

Did you build backlinks from certain domain names for those keywords? May be Penguine 2.0 hit those sites who were providing you link juice and support such keywords.

Thanks

agreed!

Its better to adopt a proactive approach instead of sitting back and wait for penalization. If it makes you feel unnatural then it is the case with Google spiders as well. Later or sooner if there system picked your site for scrutiny they can creates problem for your website so its better to cleanup such links and as a last resort you may use disavow tool.

Always record your communications whenever you have such problem you can show that to Google webspam team as a proof of your sincere efforts.

I hope it helps.

Thanks

Sounds like you got duplicate content on your website. Is this the case?

Its better to adopt a proactive approach instead of sitting back and wait for penalization. If it makes you feel unnatural then it is the case with Google spiders as well. Later or sooner if there system picked your site for scrutiny they can creates problem for your website so its better to cleanup such links and as a last resort you may use disavow tool.

Always record your communications whenever you have such problem you can show that to Google webspam team as a proof of your sincere efforts.

I hope it helps.

Thanks

agreed!