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Perhaps it is.  Each of the pages is about a different office of the same firm.  So the language is similar.  I am trying to make each page as different as possible to see if it makes a difference.  Any idea how long it will take to get back to where we were?

yes, although usually its geographic, like

new york blue widget

blue widget san francisco

We had i internal pages that were graded A by the tool here for their on-page optimization.  they were climbing the rankings.  One was number 1.  Others were first page.  Now they are so far down the list I can't find them....

We had optimized internal pages, targeting specific geographic markets.  The pages used the keywords in the url title, the h1 tag, and within the content.  They scored well using the SEOmoz tool and were increasing in rank every week.  Then all of a sudden today, they disappeared.  We had added a few links from textlink.com to test them out, but that's about the only change we made.  The pages had a dynamic url, "?page=" that we were about to redirect to a static url but hadn't done it yet.  The static url was redirecting to the dynamic url.  Does anyone have any idea what happened?  Thanks!

Thanks!  What I meant by "hurting progress so far" was that some of these pages are highly ranked and we are trying to improve their ranking further by changing from dynamic (?page=) to static addresses without hurting the ranks--since the whole point is to improve the ranks.

Question about changing url from dynamic to static to improve SEO but concern about hurting progress made so far.