Sigh...
What's up with all these people who have no idea how modern technology works, get frustrated, and think that because something doesn't work the way they assume it to (naïvety and all), it MUST BE A BUG AND MUST BE FIXED IMMEDIATELY BY THE MANUFACTURER OMGWTFBBQ!!!111!!.
There's nothing wrong with the way the Fantom-G allocates tracks, especially within the confines of how part-based sequencers work. This doesn't mean I'm blindly defending Roland, much less that I'm some fanboy—It simply means I know what a bug (or poor implementation) is or isn't.
All your tracks have been pre-assigned. If you want track 2 to be audio, move an audio track there. It ain't rocket science.
This reminds me of that thread where someone didn't know how MIDI worked, and then got PISSED that MIDI tracks didn't have volume controls, completely oblivious that MIDI tracks, by definition, can't have volume controls. It's one thing to post "Hey guys, why don't the MIDI tracks have volume controls?" It's another thing entirely to say "OMG! Roland are insane that the G's MIDI tracks don't have volume controls!"
Normally, I wouldn't care. But the Fantom-G has legitimate issues that need to be addressed. This simply adds to the noise and if anything, causes the powers that be to look at this forum and think "Wow, the Fantomized guys have no idea what they're talking about. We shouldn't take them seriously."
Read up on part-based sequencing. There are a good half-dozen threads devoted to it.