Tripp, the difference between the original and openxcom is not in the time units, but in
the direction the aliens are facing. see also
here.
the way to avoid this is a very, very old tactic known as "throw a smoke grenade".
basically, equip your first soldier with a smoke grenade (thanks to openxcom, you can even pre-prime it in the mission loadout screen by right-clicking on it). then as your very first move, you throw that smoke grenade to the bottom of the skyranger's ramp, and END THE TURN. your soldiers should be safe from enemy fire because of the smoke screen, and the aliens will move, burning (some of) their TUs, allowing a "relatively safe" exit in the second turn of the battle.