If your content is being posted at the wrong time, it might be related to the time zone of your account. When you create your account, Postcron automatically sets up your time zone. However, if needed you can change your account's time zone by going to Your Account on the side menu where your profile picture is, and clicking on Settings. Then change the Time Zone under Your Preferences. Make sure you confirm by clicking Save Changes.
You can always check your account’s time zone right below the Time Zone selector:
Keep in mind that your account’s time zone will directly affect the scheduled time of your posts.