Subtasks appear twice
I have created a task in a project with indented sub tasks all with no due date. When I view No due date tasks the parent task and subtasks appear in the list (parent task has the little triangle to show/hide subtasks) but the subtasks also appear as individual tasks not associated with a parent further down the list. This is confusing. Any work around.
This is an intended behavior. When you search for anything (date, no date, label etc.), Todoist shows you every single task (and sub-task) that meets the search criteria. Because both the parent and the sub-task do, both will be displayed.
This way, you'll never miss a task (which you could if we would hide tasks that match the search under parent tasks) and also won't need to see tasks that don't meet the search criteria (if a sub-task would, but the parent wouldn't - you would have to browser through the parents that may be unrelated just to find the sub-task that is).