Just to recap all the implications of this design, none of which make sense:
- my tasks don’t show group subtasks under their project
- subtasks don’t appear on a project calendar
- search results don’t show project name for subtask results, making subtask names devoid of context
There are two workarounds:
- Manually add each subtasks to the parent project
- use tags with project names (does not address the second issue above)
The only workaround to any of these is for the third issue, and that involves creating a new tag for each project and applying it to every subtask.
BTW, according to this thread, as of Jan 10 the Asana team are working on addressing this, presumably by making subtasks inherit projects automatically.