SONAR content question on SEPM12.1

Hi

I have a question about SONAR content on SEPM 12.1.

In our environment, we are running SEPM 12.1.2015 with Win7 clients, mostly on client version 11.

On version 11 clients, I am finding that the PTP content is being updated almost daily.

However, on version 12.1 client, the PTP update is not so regular. The last content update was 18/7/2014.

From the SEPM console, in LiveUpdate Downloads, i can see these items:

- SONAR scan whitelist Win64 11.0      (6/8/2014 r3)

- SONAR Heuristic engine 12.1 RU2     (18/7/2014)

So i assume that version 11 clients grap the SONAR whitelist, and version 12.1 clients grabs the Heuristic engine. Is that correct?

If so, why does version 11 content update on daily basis, whereas version 12.1 content not?

Thanks,

DM.