Not necassarily true. My boyfriend is paying child support on both of his kids, both in MI, in two seperate counties. They each get similar amounts. ($140/week on one child, $180/week on the other.) Filing dates were two years apart. They both get the same amount out of his garnished wages. Same thing with my ex, who is paying on three children, one in the state and two in other states. When he does bother to get a job or get hauled in for non-payment, the money collected is split evenly. The only issue I can see is that the one he is living with might get some jealousy from the one (or more) that he isn't living with and directly supporting. MOO.
ETA: If it does come out in some way that this whole thing was related to child support, DL is dumber than I thought. He had Bianca with him for a week. Once a parent paying child support has the child in their physical custody for 7 days or more (MI law) they can file to have their support payments stopped, and child support reversed and paid by the parent that does not have physical custody.