On Wed, Apr 30, 2008 at 2:25 AM, ssgam <sangsuan.gam at gmail.com> wrote:
>  after running the 2 scripts above, the origin was moved from N1 to N2.
>  i was able to update a row in a table in the set on N2, and the change
>  was reflected on N1.

What version of Slony? According this message[1] there is a bug when
failing over in 1.2.13 - I wonder if this is the bug you are hitting.
Can you try the latest from CVS?

-Dave

[1] http://www.nabble.com/Slony-version-1.2.14--to16972969.html