There is no Endpoint 5.5
There is only Endpoint 5.1
vCloud Networking and Security 5.5 will push out an Endpoint 5.1 package to 5.1, and 5.5 hosts.
@Cyberfed27 The Summary page will only ever show the version of the OVF file originally deployed, the update method used to patch vShield Manager does not have the ability to modify the VM information in vCenter. Also go off of the "show version" or About dialog.
