1. Im a 'tard so dont slap me please

2. Im experimenting with very simple map containing 4 cities and one resource (grain)
3. when loading map, I do not randmise it.
Why is it that when I load lets say original UK map without randomising it, the placement of resources is different from previous map loads and cities contain different industries, but this not happen when I load my own map.
Even when choosing to randomise my map, while cities and landscape changes, resource do not move and I end up with farm in a lake. City industries do not change either.
I had a look at various XML file in attempt to understand this problem but to no avail.
I downloaded 2 custom maps, RandomMap and Australia. When loading RandomMap wihtout actually randomisisng it, the placement of resources and industries changes with each reload. This dooes not happen with Australia map - resources appear in the same spot each time.
What caues it and how do I introduce this 'randmoness' into my own map? Thanx.