A common reason for this issue is incorrect time zone. This means, if you have chosen the wrong time zone for your posts, they won’t get published as per the schedule. 

The solution is to change the time zone as per your location. To change the time zone, 

• Go to “Profile” on the Social Blaze dashboard.
• Select “Your Profile” from the menu. 
• In the “Date & Time” section, select the time zone as per your preference.