Real Time Playing? [Outdated]

What particular feauture is allowing my opponents to be playing at the same time as me? Just now, I had just begun my turn, was about to deploy my armies on a country I owned, & hit Deploy. It gave me an Illegal Move block, and the country was now my opponents'! This real-time playing simply does not work! How can I possibly know where to attack or fortify, if my opponents are busy attacking me while my turn is happening without my knowledge! Very frustrating. If that option continues, I really can't see continuing to play the game.