why does it always happen when I should be asleep?
This happens all the time to me. I like to write and I suffer from writers block from time to time. My best work (in my opinion) comes at either the start of a new day, like 3:30am when the birds are just starting to stir and the night sky is giving way to the pastel gray of the coming day. Another good time to write for me is,,, just before bed.
I think that everyone would have a late night every now and then, thinking about things that have been on their minds of late but have never been able to work them out. When you think about something when you're tired it can be hard to remember what your thoughts were when you wake up. I write things down (or type them actually) so I can remember what my weary mind was doing. Being sleepy can give you some really great ideas but if you don't remember them in the morning what good is that?
When we get sleepy things can seem a little more simple. Things can seem very complex sometimes but if you take time to think and remember your thoughts when you're not sleepy, you may find that the complexities are merely an illusion.
When you are close to journeys end (thinking about a situation) why would your mind let you go to sleep? Sometimes you can go to sleep and pick up the pieces in the morning but other times you just have to get the job done, come to a conclusion and fall asleep happily.
This is obviously something you have been thinking a lot about lately. Or you spent too much time sleeping in the afternoon.
I sold my plantations and the wood price went up the next week, or was wood always dear? Everything changes and if I remember correctly, I started Smellin Inc about 5 times. I should have restarted a sixth time but I decided to just keep going and change my company structure as time went by. This probably slowed my start down heaps but the mistakes I made, I made for a purpose.... To learn what I was doing...
I made and sold wardrobes through my own stores, sold them to CMB (oh and by the ways, thanks CMB) and I also sold my joineries and furniture stores back to the system. That gave me enough experience in the field to know that I didn't want to make wardrobes
why does it always happen when I should be asleep?
Because your mind never goes to sleep, only the body sleeps.

I love ranting sometimes.