Version 2.1.1? The only versions of SEP for Mac are 11.0.6000 and 11.0.6100. From where are you getting the version number?
Was everything working well prior to the upgrade? I suppose it is possible that the OS upgrade did something to some of the kernel-level files. What you're describing isn't usual behaviour unless it's managed and it's been given a schedule that's (e.g.) every 4 hours.
I would probably consider removing and reinstalling SEP if the operating system upgrade was the trigger for this issue.
If you enter sudo symsched -l (that's a lower case L) into a terminal window, what's shown there? What about just symsched -l?
This might be helpful for you:
http://www.symantec.com/docs/TECH134203 - Symantec Endpoint Protection for Macintosh Frequently Asked Questions (SEP for Mac FAQ)
sandra
Edited to say: Oh, you say you resolved the issue. Never mind! :D