[CentOS] latest kernel-devel,kernel-smp-devel install vs. update

WIth the latest kernel 2.6.9-34.0.1

the kernel-devel is an install, but kernel-smp-devel is an update

for example

$ sudo yum update kernel\* --disablerepo=dell-software -- 
disablerepo=jpackage-generic
Setting up Update Process
Setting up repositories
Reading repository metadata in from local files
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package kernel-smp-devel.i686 0:2.6.9-34.0.1.EL set to be updated
---> Package kernel-devel.i686 0:2.6.9-34.0.1.EL set to be installed
---> Package kernel.i686 0:2.6.9-34.0.1.EL set to be installed
---> Package kernel-smp.i686 0:2.6.9-34.0.1.EL set to be installed
--> Running transaction check

Dependencies Resolved

======================================================================== 
=====
Package                 Arch       Version          Repository         
Size
======================================================================== 
=====
Installing:
kernel                  i686       2.6.9-34.0.1.EL   
update             10 M
kernel-devel            i686       2.6.9-34.0.1.EL  update             
3.7 M
kernel-smp              i686       2.6.9-34.0.1.EL  update             
9.9 M
Updating:
kernel-smp-devel        i686       2.6.9-34.0.1.EL  update             
3.7 M

Transaction Summary
======================================================================== 
=====
Install      3 Package(s)
Update       1 Package(s)
Remove       0 Package(s)
Total download size: 28 M
Is this ok [y/N]: n

I would like for both devel packages to be installed rather than  
updated.
Looking back in the archives, this happened before. It was suggested  
to use

installonlypackages=kernel-smp-devel

I have put this line in my CentOS-Base.repo file, in the updates  
section, but it doesn't seem to have any effect. Is that the right  
place?

Thanks,
Tony Schreiner
Boston College