Really no idea what's going on here.
I quote: "It is unclear whether: Regular second class (2-1 and 2-2) ONLY (meaning no transcendent characters) can change into 3-1 and 3-2. -OR- both 2-1, 2-2, and their transcendent counterparts can change into third classes, with higher bonuses for those who rebirth first."
1-1 Merchant > 2-1 Blacksmit > 2-1(Trans) Whitesmith > 3-1 Mechanic. (So it seems)
From what I understand, they either make us choose between Whitesmith and Mechanic, or they're doing the thing above.
It's still early to talk about it. I bet they will release them (If they do) in a year instead of "2008", cause Gravity fails.
PS. "Whitesmith is 3rd Job.", Nope.