Thanks, this one was a real bug and your description pinned it exactly. The EXP for a solo kill is paid by the share of the monster HP you dealt. Soul hits were counted as yours, but your own melee swings were never added to that total. So a kill where Soul did part of the damage and you finished it paid only the part Soul did, while a kill with no Soul hits at all fell back to full EXP. Melee hits now count toward your share too, so Soul plus your swings pays the same full EXP as a kill done alone. LIVE now (refresh the game to pick it up).