Free PBX Distro 5.211.65-21 operating system?

Hi,

One of our sites has a FreePBX Distro 5.211.65-21 box (will be fully upto date soon). It has been upgraded gradually from older versions. Looking at this page my version should be running CentOS 6.5. However the machine is running CentOS 6.3.

Is this normal please?

Thanks

Yum Update command solved this. Once it was ran the OS upgraded without issue.

Thanks