Maybe try on your mouse? it might be an issue with your tablet setup. I remember it being a bit of a pain when i was setting up mine. Make sure that middle click is not set up correctly and not set to mouse 3 or something. "Debug" it with your mouse. Right click marquee should select front facing faces wile middle click…
I checked with the people on the foundry and so far it seems that Modo just selects face differently. Not that big a deal I guess, I just wanted to be sure.