Some help please

[Thrud]

1. How do you stop rioting? I can't build an 'Urban Pacification' thingy because it says 'Never' when I try?

2. I played with 'Finite Resources' on and, when told that a planet had run out of minerals, I looked at the planet during the next turn and, under 'Production' from the 'Colonies' menu, it said that the same planet was producing 27,000 minerals. Shouldn't it say zero? Should I have removed the 'Mineral Facility' thingys from the planet and built other things (I suspect yes).

Thanks for any help.