If your scheduler is not playing the correct program data at the specified time it could be that the GMT for your scheduler is not set to the correct Timezone (TZ).
To set the TZ for your station you will want to go to the scheduler page which is under "Playlists" located under "My Broadcast".
On this page, click the drop down menu for the GMT and choose the GMT for your Timezone (TZ)
After you have chosen the correct GMT choose the text link to "adjust all events"
For help with finding your timezone you can always use the link below to find your timezone to set the GMT on the scheduler page.