AS WELL.............. the human player in a PBEM game
CAN elect to autodeploy his force and SOMETIMES that tosses a unit or two across the start line
Like this............... ( but this was only a 20x20 map a bigger map may give a bigger spread )
It's an OLD trick..You autodeploy units until you one get some deployed forward of the line then you manually adjust your set up of the rest of the units but as Andy said the AI AND the Human player can deploy little surprises up to half way