It sounds like the task might not be completing successfully, and multiple instances of the task might be trying to run at the same time.
Open up Scheduled Tasks from the Control Panel.
Right click on the task you've created and click "Properties."
Navigate to the "Schedule" tab.
Choose the start time (00:10 AM)
Make sure that Schedule Task Daily is set to Every 1 day(s).
Check the "Repeat Task" checkbox.
Until: (select bullet) Time: (enter 11:59 PM) and click "OK"
Open the "Settings" tab now.
[Check] Stop the task if it runs for:  hour(s) and  minute(s). Click "OK" This will prevent multiple instances of the scheduled task from running at the same time, possibly causing the conflicts you've described.
If the scheduled task is set to run every 30 minutes, set it to stop the task after 29 minutes (in case it hangs for some reason).
If this is the problem you'll want to look at what your task is doing, and see what might be causing it to hang. A successfully executed task will exit with Last Result = 0x0.