http://www.cybernations.net/nation_drill_d...ation_ID=206607
I currently have 3 improvements bought and have over 4000 working citizens. When I go to buy another improvement, I am told I can only buy an improvement every 1000 citizens and I am told that I already have 4 improvements bought. I also noticed that I have been paying the extra $500 as if I did have the improvement.