Inbound Click Tracking using Google...

I run an aggregated search site which is monetised on a cost per click basis.  I have a client who is trying to use GA to track inbound clicks as a method of confirming the numbers which I report.  I use javascript to create the URL which means it is not possible to track a referrer URL for IE users.  My client has appended tracking code to the click through as follows - &utm_source=Classifind&utm_medium=cpc&utm_content=Listings&utm_campaign=ClassifindCPC - however the reported numbers in GA are only about 25% of the clicks we are actually sending.  I suspect GA is reporting "users / browsers" as opposed to "clicks" which means if I send the same user to my clients site several times in the one session I am only getting credit for one whereas I need to record all so I can charge on a CPC basis.  Is there a workaround which either I or my client can implement so that GA actually records every single CLICK and not just each USER / BROWSER?