> just use the dmesg before it duplicates itself?  or do i have something
> misconfigured?

$ man dmesg
...
FILES
     /var/run/dmesg.boot  copy of dmesg at the time of last boot.
...


dmesg displays the contents of dmesg.boot to the screen and then you're piping 
it to more, which displays it on the screen as well :-)

David