Why are SEOmoz Pro Keyword Ranking reports different between two 301-linked URLs?

[dancenut]

Hi,

My main domain is www.dancenut.com.  I have this 301 URL redirected to www.dancenut.com/boston/.  I set up an SEOmoz Pro campaign for each of these URLs in order to see if they were being treated differently in any way.  In most cases the report results are identical, or the small differences are understandable.

However, there is one big difference between the two sets of campaign reports.  In the Keyword Ranking reports, the data for the Bing and Yahoo! reports are identical, but the data for the Google reports are dramatically different.  Out of 21 keywords, 9 are listed in the top 50 for www.dancenut.com, but only 2 are listed in the top 50 for www.dancenut.com/boston/ (the specific positions are the same for the 2 keywords that are listed for both).

Does this make any sense?  Could the SEOmoz Pro data be wrong?  If not, then I'm suspicious that Google may not be interpreting the 301 redirect properly.  I don't think this could be fully explained by a 1-10% reduction in link juice due to the 301 because I have one keyword for which my site ranks #1 in Google, Bing, and Yahoo! with www.dancenut.com, but it doesn't even rank in the top 50 in Google with www.dancenut.com/boston/.  And why would these differences only exist for Google?

Any insight would be much appreciated!

Andrew

[EricaMcGillivray]

Hi Andrew, A 301 redirect will delude your link juice for the URL that's being 301'd. At to why it's so drastic on Google, you probably blame Panda as Google may be seeing it as duplicate content for the same keyword. Hope this helps! Erica