Why a domed city when I have the correct planet / atmosphere?

[C4]

I had the exact same thing happen to me only it was with a Rock colony. When I colonized I picked a military installation. The planet had an O2 atmosphere and it was small. For some reason the colony came domed with a max facility of 5.

I abandoned the planet, recolonized and picked a mining colony type. This time the colony wasn't domed and the max facility was 10.

Maybe this is a bug? I didn't conquer any other planets yet so I don't think I would would have colonized with any other races besides human.

[This message has been edited by C4 (edited 18 November 2000).]