Banners positions on pictures gallery

[builders]

Hi guys
A friend of mine helped me to get some banners up but some of them are doubled up , one on top of each other and we don't know how to fix this. Any idea please ?

http://www.robuild.co.uk/london_builders/

Thank you in advance
Best Regards 

[builders]

If you scroll down the page , you can see where the problem is

[Jeff Bailey]

<!--Coppermine Photo Gallery 1.5.12 (stable)-->
Please update.
http://forum.coppermine-gallery.net/index.php/topic,74682.0.html
http://documentation.coppermine-gallery.net/en/upgrading.htm#upgrade_any

After that please upload your custom theme.php as theme.php.txt.