I see the problem was mentioned last October but the glitch is still there.
This is the second or third time Ive encountered the issue where the payout didn't match the job I selected. Before turning in for the night, I usually choose the third job option, the one for 8 hours. Tonight, when I checked the game before the eight hours were up, I received $300, as if I had picked the shortest job.
I've tried logging out and logging back in; I had to do that twice for it to finally show the right job I selected, though. But that still meant I have to start an eight hour long job all over again.