[CentOS] CR repo - version issue

Hi

We use mrepo to keep a local repository.  I downloaded the CentOS6.1 iso 
and used that as the base.  We also have the CR repo added.

I was expecting this change to cause no issues but the following 
packages have version issues between the base 6.1 and the CR repo:-

base version                               CR version
dbus-libs-1.2.24-4.el6_0.x86_64 dbus-libs-1.2.24-5.el6_1.x86_64
libpng-1.2.44-1.el6.x86_64         libpng-1.2.46-1.el6_1.x86_64
cups-libs-1.4.2-39.el6.x86_64    cups-libs-1.4.2-39.el6_1.1.x86_64
zlib-1.2.3-25.el6.x86_64             zlib-1.2.3-26.el6.x86_64
krb5-libs-1.9-9.el6.x86_64          krb5-libs-1.9-9.el6_1.2.x86_64
perl-5.10.1-119.el6.x86_64         perl-5.10.1-119.el6_1.1.x86_64
perl-libs-5.10.1-119.el6.x86_64   perl-libs-5.10.1-119.el6_1.1.x86_64


There maybe a few other packages but this causes an issue with yum as it 
doesn't handle the el6_ suffix differences.

Is this the intended behaviour ?

Thanks