That looks... strange. But still could be read as the same rule
or the other way around, but if commata were used it could be two things:
1) old meaning -they can't run away
Roll off if an INFANTRY unit, within 1" of any
enemy models, with this ability wishes to Fall Back. The
unit can only Fall Back if the player controlling it wins
the roll-off.
2) alternative meaning - you can't run away
Roll off if an INFANTRY unit, within 1" of any
enemy models with this ability, wishes to Fall Back. The
unit can only Fall Back if the player controlling it wins
the roll-off.
But I guess the the 1st way is the way to go. Else we know why they got cheaper but got an additional attack