Hi,
I have the very same issue; I have built the desktop site and started to build my tablet and phone versions but before getting to head long into I decided to test it to see if it works.
Desktop - Loads the Desktop version
Tablet - Loads the phone version (Sony Xperia S Tablet (SGPT11))
Phone - Loads the phone version
At first I thought it might be to do with the screen resolution of the Sony Xperia Tablet being its a 9.4" and none standard, so I changed the size of the page a number of different ways to bring it inline with device resolution, but nothing seemed to work - it would always load the phone version - however I can edit the address from /phone/index to /tablet/index and it will display the right version. Has me wondering if it's something to do with BC profiling for devices maybe?
I am at a complete loss and as it the only tablet I have for testing it would be great if I can work out what is going on as it would be handy to use it with clients!
Site Address:
http://cottoninktesting.businesscatalyst.com/
Any help would be gratefully received as new to Muse after spending much of my life using Dreamweaver and so far I am very at impressed as its massively reduced the time it takes to create a professional looking site.
Regards
Darren Cotton