Hello clerkmore and welcome to the site.
I can understand your worrying that the cancer is increasing and realistically there is little anyone can say to stop you doing that.
Your consultant may well be right in that the original 1/10 was optimistic which would then make the increase less than it is currently appearing as.
I'm sure there will be other members who can be more informative regarding information on your scores.
However, while you wait for them have you though about downloading or applying for The Tool kit which is available through the publications section of this site.
They are a set of free, informative booklets regarding diagnosis, symptoms and treatments.
If nothing else they will help you make a list of questions to take with you when you next see a consultant.
You have to weigh up the worry of active surveillance and the possibility of an increase in spread or the possible life affecting results of radical treatment.
The more information you can glean the better. BUT try and stick to sites like this one or Cancer research rather than just surfing the web as not all information if relevant and can sometimes be un-necessarily scary.
Best wishes and I hope somebody else comes along soon.
Sandra