worlds 1,2,3 are done with the old engine first, then the new engine goes, it appears the morning / night sim run for the new engine takes time most nights, I am pretty sure in the afternoon the new engine runs exactly an hour after the old one, central time that is 1pm and 2pm - worlds 1,2,3 only have a few more games , 2 weeks max, at which point the old engine goes away, I would suspect things will get better then