I have PTW, and I've found a strange bug in the summary. When it shows the events, in the bottom-left, the game puts the events there when the NEXT event occurs and is showed at the top. In other words, it could go like this:
4000 BC
Top: Athens Founded, 4000BC
Box: Nothing
3600 BC
Top: Nothing
Box: Nothing
3200 BC
Top: Sparta Founded, 3200BC
Box: Athens Founded, 4000BC
etc
4000 BC
Top: Athens Founded, 4000BC
Box: Nothing
3600 BC
Top: Nothing
Box: Nothing
3200 BC
Top: Sparta Founded, 3200BC
Box: Athens Founded, 4000BC
etc
