Before NSX 4.2, there were 2 installation modes provided:
NSX 4.2+ now supports a single installation mode where the previous 2 installation modes are supported on a single DVPG.
vlan-tz.VMyTZ-NET
vlan-tz.security.########-####-####-############VMyTZ-NET
EXAMPLE:
NSX 4.2+
This is expected behavior
Refer to the installation guides for further in depth detail: