Duration of planning days of activities disagree with the planned hours

Hello all,
we have a problem with the planning of activities. I created a project with some activites, I said the first activity “Verdrahtung1” will need 30 hours. (As basic settings we have working hours for 6 hours per day.) So normally the program should plan the activity for at least 5 days. But it’s just for one day as you can see in the picture. So the time is too short. When I run the planning nothing changed. Is it a bug or is it my mistake?



Another thing is, when I change the planning in “as soon as possible” the activity starts today although the project has the validated start date 22.08.2018. (But it’s still just one day.) In my understandig activites should only be planned after the validated start date of the project and not before the project starts.

Thanks for your help.