i have the same problem. i used the trainer to give me some money and i freeze it, played for some time, and somehow the money value get converted back to the original value, so i ended up with negative money. i can edit it again with the trainer to make it positive, but then it will be negative again after some time.
This is my experience as well. The enable console option definitely functions. But the iron man mode and achievements values never change away from '??'.