What does that mean exactly? Assuming you did schedule it correctly, then when nothing is scheduled 18:30-8:30 default layout should be displayed. Perhaps default layout and the scheduled one are the same?
Is this recurring event? ie did you set it to repeat every day for example?
Well in this case you’d want to schedule it like this (for example) :
Start time: 21 September 2015 - 08:30
End time: 21 September 2015 - 18:30
If it’s recurring event ie you would want to schedule it for let’s say 5 days for example then on ‘repeat’ tab
Repeats: Daily
Repeats every: 1
Until: 25 September 2015 - 18:30