Who told you to move?

[Volcano Man]

This is actually a common mistake and I do it all the time. I do this often when I am trying to do a group move, by selecting the hex of the unit and CTRL right clicking (or whatever it is) to move the chain of units along the road. If you accidentally have a unit in the hex highlighted / selected then it will give AI orders to the units which you will have to go to the AI menu and delete those orders or else they will move when you click to end the turn.