User blog comment:Peder Moe/The Dark Brotherhood: Missons is going over agian?/@comment-4654748-20111204221634

If you've reached the "Dark Brotherhood Forever" section of the Dark Brotherhood quest line and you are accepting said quests from the Night Mother then yes, the game is recycling missions in an attempt to give the player a steady source of income. If, however, you are receiving these quest from Nazir then there is something wrong because his line of quests has a definitive end.