I am playing a hot seat game right now and I decide to play ever civ since 3000 BC and I have had a problem with research. The research is getting ridiculous, for example it is costing most civs 8000-9000 research points to get teachs like Compass or Feudalism. None of the Civs are advancing despite buildling libraries, spawning great people, etc. Anyone else had a problem? Is this a bug?