If in fact the text is the same for both TV1 and TV2, I suspect that's where the typo came from.
In truth, as hard as it may be to believe, it appears that someone actually thought about how the TV2 output was going to be used, and added an MTS encoder to the box. Shame it didn't make it to the 322 AFAIK.
Here's the way to tell. Go to your TV's menu and cycle through the display modes looking for current audio status. It should say Stereo. If not, hit the TV's settings menus until you find the audio cotrols and enable MTS stereo. If it's not there, your set probably doesn't have an MTS decoder, ad you're going to have to look at other solutions.