Certain trophies do not track correctly. In particular, Nerdopolis (have had several cities over several games earn over 1000 science per turn, and Wonder-Full (am currently at 1%, but have built approx 2/3 from each era in a single game), Polymath (have definitely researched every tech in a single game twice now) & finally Landstalker (had a huge empire spanning about 75/80% of the land/terretories)