League problem

We are in a heated discussion in our group and wanted to know your take on it. So a guy just drop a guy after the rangers game and pickup another player for the habs game just before it started. He did the waiver pickup at 18:50. He said he should get the points of the last guy and just lose the game of the first player. I dont thinks it's legit and the comissionner dont know what to do. What is your take?