Mini Guide: Getting started with Rome II

[Quillan]

I don't know if my games is bugged, but I don't think it is. I can only build one each of the level 5 buildings. It will not allow me to build a Circus Maximus when one already exists. I built the Colosseum in Rome. I could not build a Circus Maximus there because it only allowed one amphitheater-line building in the city, so I built in Carthago instead. When I completed the Circus, the only upgrade option there was the Circus Maximus, not another Colosseum. Since it finished, I cannot go beyond the Circus in Alexandria. I highly suspect the same will be true of any level V building.