I used to this before as well. Yes it does update all the components , if those components are installed
why dont you try running JDB, with SEP 12.X it now updates all the components.
Prior releases prior to SEP 12.1 RU3, there is no way to update the Proactive Threat Protection (PTP) and Network Threat Protection (NTP) definitions on the SEPM without using LiveUpdate Administrator 2.x.
SEPMs running SEP 12.1 RU3 and above can update their SONAR ("Behavior-Based Protection") and IPS ("Network-Based Protection") definitions using new .jdb files available from Security Response's Virus Definitions & Security Updates page.
Check this Article:
How to update content on a Symantec Endpoint Protection Manager that does not have Internet access
http://www.symantec.com/docs/TECH104893
SONAR and IPS Intelligent updater (IU) are now available on :
http://www.symantec.com/security_response/definitions.jsp