After editing the Host Switch in a Transport Node Profile in the NSX GUI, any API specific switch profiles that had been applied to the Transport Node Profile, such as Multi-TEP HA profiles, are lost.
VMware NSX 4.1.x
VMware NSX 4.2
While saving Transport Node Profiles in the NSX GUI, only the profiles present in the UI are considered (Uplink, LLDP and NIOC) and the entire host switch profile is replaced causing API-only profiles to be dropped.
This will be fixed in a future version of VMware NSX.
Workaround
VMware NSX documentation for Multi-TEP High Availability.