On my f19 machine:
% rpm -q kernel-devel
kernel-devel-3.11.10-200.fc19.x86_64
kernel-devel-3.12.5-200.fc19.x86_64
% pminfo -f rpm.version| grep kernel-devel
inst [2514 or "kernel-devel"] value "3.11.10"
(note the 3.12.5 info is missing)
Similarly for other RPMs of whom more than one version/release is concurrently
installed. (Having multiple versions like this is normal.)
The rpm pmda should not use rpm "n" (name) as its key instance-domain,
but rather the whole n-v-r-a string, or (if possible) some rpmlib
internal unique & persistent identifier. (It is possible, though not
quite normal, for the exact same n-v-r-a rpm to be installed multiple
times.)