All URL to past articles redirect to /blog/myblog/

Our blog is here:

http://www.himalayanacademy.com/blog/taka/

if you search “TAKA Hawaii monastery” in Google you will get many links to our blog.. but all past links are redirecting to the “top” blog page

e.g. try this link:

http://himalayanacademy.com/blog/taka/2010/02/09/hindu-students-council-retreat-at-fort-parker/

and you end up on today’s blog (set to show 8 most recent posts)

http://himalayanacademy.com/blog/taka/

But the URL in the address bar does not change (it keeps the URL of the past article
———

Details:
1) This current site is migrated from CentOS5.0 to CentoOS6.2 running apache.
2) Part of our migration process was an attempt to harden WordPress so we
a) install a fresh, completely new version of Word Press 3.3.1
b) use the “export” tool on the old site
c) imported this into the new site
d) copied the WordPress_mu database from one machine to the other
e) linked that dBase back to the new word press.

3) Actually it was all very easy and appear to work out of the box… some of the plugins had all default settings so we are working to set up those as they were from with the new admin for 3.3.1

But now, WordPress will not honor any links to past articles.

Any ideas? I’m sure it’s something really simple.