Question about Cache settings

Hi there.

I currently admin a site that seems to have some odd cache issues. The site is currently a JA theme based on the T3 Framework. (no I am not asking for support on a non-GP template). I am going to be converting over the site to a GP/Gavern setup and want to know what I need to set the cache settings to so that I can avoid the issues I am currently experiencing.

The Issue:

About 30% of the time when a user logs in.....they get an "expired token" error and cannot access the registered user content of the site. And refreshing their browser or trying to re-log in does not fix the issue. In fact some users have to try 4-5 times (and different browsers) before they can log in.

The site is Joomla 2.5.14
system cache= Turned on (conservative)
T3 Framework Cache= Turned on.
CSS and JS files are compressed and minified and gzipped


My question(s) are:

1) With all of these different cache settings and compression settings.....once I get the new framework installed, what settings should be set and to what to maximize site performance/load time.

2) The site is for a sports league that updates content relatively frequently....(I know, not ideal for a cache'd system) and I have noticed that even with the cache expiration time set for 10 mins in the global admin settings......the new content doesn't display after the 10 mins expire and I think the framework is holding on to the cache longer than system timer is set for. I have to manually go in and refresh the T3 Framework Cache - will this happen with the GP cache settings as well??? Do they refresh when the system cache refreshes or are they on a different timer setting than the system cache.

My concern is that because our site is on a shared hosting environment and I am having to cache, minify, compress and gzip just to keep site load times acceptable that ...somehow....somewhere....something is misconfigured and causing the user login security token issue and the content/site cache release.

I am hoping - with a Gavern Site - that I can find a good middle-ground with caching and compression without compromising my user experience. Which currently it is.

Proper cache configuration for our templates is described here http://www.gavick.com/documentation/joomla-extensions/extensions-for-joomla-1-6/gk-cahce-plugin/

Our cache plugins works exactly the same like the Joomla! one.

"expired token"

issue is not related with cache but with your user sessions, probably user session time is too long so sessions for one users are duplicated or you have multiple users using the same username which creates common 'token' problem.