Adding / to end of URL takes user to random page and on other pages strips images
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I'm working on a site here:

http://www.cluttons.com/en-GB/about-us/about-cluttons.aspx

Now if you add a / to the end of the URL the images vanish, this means I cannot place Google adwords tracking code on the end of any URL's:

http://www.cluttons.com/en-GB/about-us/about-cluttons.aspx/?utm_source=QR-London-Magazine&utm_medium=QR&utm_campaign=QR

This one is even stranger, if you put this into the broswer: 
http://www.cluttons.com/property/springfield-road-london-nw8-residential-freehold-house/sjw120014.aspx/?utm_source=QR-London-Magazine&utm_medium=QR&utm_campaign=QR

It takes you to a totally different page, this is the one it is supposed to show:

http://www.cluttons.com/property/springfield-road-london-nw8-residential-freehold-house/sjw120014.aspx

Even if you only put a / at the end it takes you to another page!

Any one see this before, any fixes?