I always assumed you got your reward after completion with the aetherial node, not at trade in...
He means when you go to pick up new Leves. but all it increases from what I've seen is the Gil reward. Example: "A Roseling by Any Other Name" is a 9k reward, and after trading in 3 already completed Leves, that Reward is increased to 19k. Edit:
Leve name Edited, Oct 31st 2010 4:09am by Demonadrastos
DemonAdrastos of Titan(Retired)
PLD83, THF79, NIN85, WAR45, RDM45, SMN31, DRK37, DRG25
Windurst 10, Promathia COMPLETE, Zilart COMPLETE, ToAU 20
Paladin ~ Deimos Adrastos of Behemoth