Hey Jonny,
You mention that your reptile room is at a constant 80 to 82 degrees but what are the soil/substrate temps? Do you check those as well? They could be hotter due to decomp or cooler because it is humid depending on the soil/substrate you are using. Also, when you offer a constant temperature that only swings 2 degrees, that is not exactly offering options. In fact, you are not offering options at all. Also, how long is your female set up with the full cage nesting before she lays eggs? My females are in their nesting cages weeks before they lay. They have full access to a hot spot in the upper 90's and temps as cool as 78 at the front of the rack bin. They have a wide temp range and will lay where want to lay and not in limited conditions that are forced on them.