I installed this not too long ago and it worked great for a month. Then i started to see my non-mobile start page on mobile phones but if I went into a link it would switch to mobile.
After doing some research I found that it was the CDN which I had just enabled a few days prior that was causing this. If I disabled the CDN all was well. I have the CDN disabled for now. Have you ever seen this? The CDN is 'Web Accelerator' from GoDaddy and is a part of my package.
I had W3TC installed also but in troubleshooting this I removed it and it is gone now too. I don't think W3TC had anything to do with this, it appears to be something with the CDN.