It counts as one Force Organization Slot but two units. Check out the BRB on pg 92 under "Multiple Unit Choices" for more info. :Victory:
Any ability that can affect a vehicle can be targeted at a DT. If you mean whilst the unit is in the transport, then no, unless the aster is also inside. See the BRB FAQ for that one.
Any ability that can affect a vehicle can be targeted at a DT. If you mean whilst the unit is in the transport, then no, unless the aster is also inside. See the BRB FAQ for that one.