Why is my post pending manually publishing no my mobile app?
When you go to Attention Nest app you will notice that some Instagram posts are "pending manually publish". That happens because any Instagram posts, even if scheduled for a later time will be available on the mobile app.
Once the schedule goes through, it will be removed. On the other hand, if for some reason it fails, then it will still be present for you to manually publish. Also, in case you pre-publish before the schedule goes through, it will be published immediately while the schedule gets canceled.