sorry mate, im getting confused myself. OK, let me start from the begining.

Might be useful to look at Nottingham Stag Weekends

The user goes through 5 stages of a tailor made stag package part of the site.
There are 5 steps to this tailor made section as you may have seen.
They are;
Step 1: Daytime packages
Step 2: Evening PAckages
Step 3:Hotel
Step 4: quote
Step 5: Customer details

OK, so the user goes through each step selecting the checkbox for an acvtivity they may want. Completing step 1,2 and 3.

Now they recieve an instant quote, just a price for all the activities they have selected including hotels and amount of nights. This works, they can view the quote and it wokrs fine.

But,

if they navigate somewhere else in the site, for example to the stag packages page, the go back to attempt a new tailor made weekend and get a different quote, the old one is still there. Even if you uncheck the old events. This means that the quote is wrong.

Does that help??