Caching showing admin logged in

Hi,

I’ve installed this plugin and it has improved site speed dramatically. It is an e-commerce site, and will show a basket and logged in account name at the top of each page, the only problem is now that with the plugin enabled the top of the page is now showing random accounts and basket quantities on different pages.

Is there a way around this? We really need the speed this plugin gives us (and we’ve had a few problems with bots which this is helping against as far as I know) but this makes it a very confusing shopping experience.