Post patch Missions
Tuesday's patch introduced a bug with missions and mission sequence. When a player continued a mission sequence initiated prior to the patch, the agent mission service broke down. A hotfix was applied yesterday in an attempt to repair the problem, but there are residual effects.
The agents (and the mission sequences) have self-repaired, but it is possible that some mission sequences have been reset back to start. If you are a player experiencing this problem, petition a GM. They should be able to reset your mission sequence to the proper order.