[Wayno]

The last adjustment i did was with the car running and i just put the overflow plug in when the fluid changed from gushing to trickle. I ended up draining 2L overall due to emptying when the car wasn't running and filling about 2.5.

So yep if you don't have the car running and you pull the overflow plug you lose over a litre of fluid that has drained into the pan while not running, then it complains when you shift ranges.