I'm able to see Sub-Tasks as part of the main Board page.
I've even added all issue types for the scheme, and the sub-tasks still don't display under the task.

I was expecting that the sub-tasks would appear under the Task it is was created from, but it isn't appearing until the task's tile.
The sub-task doesn't appear anywhere else on the board, either.
I don't know if something is really wrong, because searching for the issue number in this field:

...it can't find the issue either (meaning I have to manually go looking for it, or search in from the side bar).
Any help you could offer would be great.
Thanks in advance.
Z.