Huh, that’s weird! I can see that this post wasn’t sent to your Publicize connections:
https://tyrochristian.org/2018/10/10/hide-them-in-your-heart-week-6/
One thing I notice, though, is that the username of the post author is different from the username of the owner of the Publicize connections (for privacy reasons, I won’t list them here), BUT the Publicize connections aren’t listed as Shared. That’s probably the problem here. As mentioned here:
https://jetpack.com/support/publicize/
When you add new connections, you have the option to decide whether it will be available to just your account or all of the other users on the blog as well. To make the connection available to everyone, just check the prompt for that at the time you add the connection.
So my suggestion is to remove the Publicize connections and re-add them, this time making them available to everyone, and then try a scheduled post again.
Let me know how it goes!