[CentOS] yum - package version database

When I query for installed package on the system, I get following result:

# yum list installed openssl
Loaded plugins: fastestmirror, tsflags, verify, versionlock
Loading mirror speeds from cached hostfile
Installed Packages
openssl.x86_64
1.0.1e-16.el6_5.4
@updates/$releasever


When I try to install already installed package (just playing with yum), I
get following result:

# yum install openssl
Loaded plugins: fastestmirror, tsflags, verify, versionlock
Loading mirror speeds from cached hostfile
Setting up Install Process
Package matching openssl-1.0.0-27.el6_4.2.x86_64 already installed.
Checking for update.
Nothing to do


Note, the version reported in both commands is different. Are they
referring to different rpmdb state? Appreciate any information on this
discrepancy.

- thanks,
N