Let me make a suggestion.
Take a look at the schedule of the incoming planes to Tromsø Airport.
I am sure the number is not astronomical.
Take a look at the times they arrive.
Then take a look at your flybuss-schedule.
See anything that doesn't match??
There is no flybuss for the plane that comes in at 1 am!!
I am pretty sure that I speak for almost everyone who was waiting in the 50 m taxi line for over half an hour Monday night when I say that it would be a good idea to do something about that...