Evade - 1 or 2 hexes?

So when a Light unit chooses to evade, must it move back the 2 hexes if 2 hexes are free? Is the 1 hex evade only allowed when only 1 hex is free?

Achtung Panzer wrote:

So when a Light unit chooses to evade, must it move back the 2 hexes if 2 hexes are free? Is the 1 hex evade only allowed when only 1 hex is free?

If a 2 hex move is available it must take it.

As the rules say on p16

An Evade move of 1 hex is possible and is permitted, but only if it is the only possible hex available.

I think there could be a situation when a unit could make a 1 hex-evade even if there is a 2 hexes- evade path available : that is if there is a lone leader in a hex just behind the unit.

In the situation shown below, the Roman light infantry, attacked in close combat by the Carthaginians medium infantry, can elect to evade into the hex with the lone leader. It stops their movement, and the leader is attached to the unit.

You are correct. This specific situation is covered in FAQ's.