Well stone me if you don't learn summat new every day. I've jus selected the drop down menu (the one directly next to the padlock symbol), raised the core up to 850, tested and it passed, then selcted the second option in the same drop down menu and lo and behold, the core dropped down to stock. Switching between the two options deffo shows the clock of both cores individually.
I thought when you overclocked anything using CCC it automatically upped both cores and memory, this shows it does one at a time, and you have to select the second core/memory option. Also if you switch between the core, I've found that the temp goes from 54c for one core and 70c ish for the other core, its as if for desktop useage, only one core is used. Now this might/probably is common knowledge for a lot of ppl here, but I certainly didn't know this.