I'm having trouble putting it all together from http://airlineroute.net/?cat=137

Can someone tell me what routes the leased Jet Airways 77Ws will be flying from BKK from 5/15 to 6/1?

It looks like as of 4/16 they'll only be operating a 2-class 77W on the BKK-BRU route (what does that mean? is that a totally different config, or do they just not sell F?)

Also, what does it mean that the 77w will be "sold as" 3-class or 2-class?