For the record, and if anyone else has a similar problem, I figured out what my issue was.
When you go to schedule a posting date and alter the time and date stamp on the post, if you are trying to post at a time in which the hour only has one digit, you still need to enter a two digit number into the hour field. (For example, if you want your post to appear at 9:01 AM on Thursday June 8, you need to set the date for June 8th and enter “09” into the hour slot, and “01” into the minute slot. Otherwise, the post just shows up.)