I've been using LDoNs on and off and generally they've been good exp. High risk giving whites and yellows and normal normally light blue with a few blues.
Tonight I did 2 with two characters (46 and 51) and a merc healer. The first time I got the adventure with the higher character and the second with the lower. Both times everything was grey to the higher and about 50/50 grey/green to the lower. These were on High risk setting.
What made it look even more like a level matching bug was the defiant drops which were Rough ie 15-30 in a dungeon that should have been at least 46. I know there is a banding effect but I've never seen it so far off balance before.
Result from 2 LDoNs was 5% on the 46. Have I just fallen foul of the banding or is there something else going on?