Bluebird doesn't look right on a Droid

I posted that my website; HotGirlsCoolStuff.com looks good on my computers but the pages background comes up on a friends Droid in a blue checkered pattern making the text unreadable. I built the site following a Tyler Moore video and used the Bluebird theme. I built this in July 2013 but don’t know the version. Someone responded that the theme was older. It is my understanding that if I update the theme, I have to start over on building. I don’t mind redoing the homepage, but I have about 15 pages of affiliate content that took 6 weeks to put together and get to look the way I’m happy with. How can I update with minimum page interference?