[CentOS] Yum not updating kernel

Hm. I just noticed http://mirror.centos.org/centos/5/updates/i386/RPMS/
kernel listings are i686.rpm. Could my problem be this is confusing yum
as I use i386 and this is the i386 directory? Doesn't make sense since
no one else seems to have this. Of course their are most likely few
running Pentium II's. Searching for answers in the dark.

Shouldn't yum update kernel work update just the kernel* rpms?
-- 
Bob Taylor