I just came across a similar situation. When I search for the Radisson Blue in downtown MSP, the number of guests affects the charge. For instance, if I select 1 adult and 1 child, it is only 50K points for either a King or 2 Queen. However, if I select 3 adults and 1 child, it is 50K points plus $20 for the 2 Queen. Room is listed as a maximum of 4 adults, so it is not as if this is exceeding occupancy.