A couple quick things about creating a new session. I think clicking the Create New Session button should automatically take you into the settings for that session.
Secondly, the timing settings are very frustrating at times. Try this.
Create new session
Go into that session's settings
Edit end time by increasing the hours forward to 1am the next day
Click + to advance the day to the next day
Now the start time has been changed to the same time
Maybe do the 'check' to see if end time is before start time when the user hits the back button to lock in the end time instead of at each end time change.