Layout showing wrong on tablets

I have designed a website www.bazincroofing.co.uk it looks just the way I want it in all browsers on my laptop but when looking at it on an ipad some of the layout is out wrong. In particular on gallery pages e.g. www.bazincroofing.co.uk/kent.htm I am losing half of the photos in the second column.

Can anyone advise what I have done wrong here please?

Also on the homepage I now want to make the fading photos at the top spread across all 3 columns, any ideas what I need to do to ‘clear’ all 3 columns?

many thanks in advance for any help you can give me