Another very strange thing that happens sometimes is that the Scipii seem to send full armies off to remote and random parts of the world, for example, a full Scipii stack might roam round a Brutii owned Greece for no obvious reason.

The strangest thing I've seen was when I was playing as Parthia. (Easy/Easy :P) The whole campaign was going rather badly so I basically decided to abandon my puny empire and send everything I had off to take that northern province with the Amazon chariots. On my way there I spotted two full Scipii stacks in the province just to the left of the Amazon one. I sent a diplomat to get map info and was rather suprised to see that they only owned Capua and Sicily, so I have no idea why they were up there. Maybe the senate was trying to stretch them and make them send all their armies away for some henious reason...