On the map By the Lake, the two watchtower to unlock with the contracts called "Guardian of the Lake" and "Spirit of the River" are switched in term of their name.
Guardian of the Lake - Deliver to the Southern Watchtower
Spirit of the River - Deliver to the Northern Watchtower
But the Southern Watchtower is at the top of the map (north) and the Northern Watchtower is closest to the bottom of the map (south)
Their names should be switched.