Translation:The whole family must sleep in one house.
I've said this before, but to me this is incomprehensible. I know that this is out of your hands, I also know not to expect this to change anytime soon. I just hope enough people raise this issue for the developers to take notice one day and implement what shouldn't be too hard a change.
Incomprehensible is an excellent description of this. There is no reason that the algorithm for checking the answer to a listening exercise should be any different than other exercises. As a software developer for over 40 years, I can pretty much guess what the algorithm is, and it seems to me that you would have to go out of your way to limit a listening exercise to just one answer.
You're right (as usual!). Perhaps the software has been set up so that you can only tag one answer as being valid for listening (maybe that's what fveldig meant above?). I realize this is a general DL software problem, and has nothing to do with the wonderful "Norwegian Team", so I hope I didn't offend anyone with my comment. (If so, jeg beklager!)