In order to know if you are doing something wrong it will be good to know what you are trying to do.
If it’s weight loss I would say add some variety into your training, more resistance work, variation of cardio, intervals etc.
I am not sure on this obviously but am guessing you are not active outside of the time on your cross trainer, which obviously won’t be helping you. Get some time outdoors walking etc. take a gaming device if this bores you, it is amazing how far you can end up going when distracted.

Light snacks, always interesting to see that one. For some this is crisps, sweet foods, including a lot of ‘healthy’ muesli bars etc. Diet needs balance, food pyramid style for proportion not portion numbers.
Predominantly inactive lifestyle and very low calorie intake will slow your metabolism, the body will assume you don’t need to be burning much energy so won’t be ready to do it.

Sleep pattern wise, there is no direct correlation between the times you sleep and body weight as long as you sleep regularly and well. That said there are a number of things that aren’t helped by having out of whack sleep patterns. One friend of mine was heavily into online gaming years ago and decided to live on US time, in the UK, he ended up with SAD due to not seeing daylight. On a totally non-fitness related point, if you are wanting work, not everyone does, I would like to retire, living on normal work time helps you finding it.
If you are happy with life on your current schedule that’s your choice.

if I have totally missed the point of what you want let me know.