I've also noticed that some combos with 2 or 3 sectors just wont work. A message pops up saying something along the lines of "this track cannot be generated" which is terrible. I mean its random, How can it not just generate something.
EDIT: I've been messing around with the course maker this morning and it seems like this issue has been resolved (maybe in the 1.07 update). I tried quite a few layouts with 2-3 sectors and they all worked.
Can you get tracks with a length of any more than 2 miles again?
No the length is still pegged at 2 miles or less, and the layouts are still not as complex as before the update.
Maybe I should explain the issue better, a while back some combos using 2-3 sections simply wouldn't work, an error message would pop up saying this layout cannot be used (or something like that), and I found I had to use more sectors to avoid this. But now it seems like this problem has been resolved, all of my 2-3 sector tracks work fine now.