I was exploring and entered a new star system (-1, 0, -1) and it happened that there were many many shops on the 'edge' of the system. In a 1x3x10 slab of sectors, 90% of these were shops. That doesn't seem to match the 5% shop spawn ratio in the config file and I also didn't find any shops in the rest of the system so they were all spawned in that small area. It seems that they should have spawned in the whole system at the 5% rate instead.
