Here's mine parked before takeoff at JFK

After nearly 20 mins to taxy and line up (including waiting for a 777 to land and clear the rwy) take off was normal

Approach and landing at KAUO were fine

BUT THEN
she carried on along the runway and took off again for a go-around.
So I think another of your problems may be, Jeff, that the runway at KAUO is just too darned short for an AI Gulfstream to land, that is unless you want to have an 'unreal' flight model with artificially low speeds.
One of the ways to get round this is to 'fiddle' the runway length in AFCAD ie you change the numbers to extend the runway but the visual doesn't change. Trouble is, you won't know the results until you try it - the plane may go ploughing into the surrounding countryside if it can't stop in time!
Roger