Just some FYI for those who don't know. Contacts are grouped by levels you get a new set every 4 to 5 levels. Once you pass the contacts top level (10 - 14, 15 - 19, 20 - 24, etc...); you can still receive missions but the monster level range will white and blue sometimes with greens and greys as well. If out run a contact that is feeding you a story arch you can get the archs finishing mission and not get the Do or So reward. This is not a bug and has alway been that way. Your best bet is find your story arch contacts early and then don't out level them for the maximum bonus.