I had a web page on my LearnSpanishPrograms.org go from #2 to the page being de-indexed?  All content is 100% unique, original.  The aim of the site is to provide legitimate reviews from authoritative sources on Spanish programs.  A welcome departure from most competing sites that 'review' products that rehash sales page content.  I wish I knew why so I could make changes to this particular page.  Other pages were not affected but this one:

http://learnspanishprograms.org/Reviews/Tell-Me-More-Spanish-Course-Review.html

I think the filter change is a good one overall and more good came out of this for sure.  But it's unfortunate some legit content got caught on the wrong side of the filter.

Thanks for your help