One dynamic task list may "copy" its tasks to an added dynamic task list with a similar name.

Steps to reproduce:
1. Add a dynamic task list with "

".
2. Add a task to this list.
3. Edit the page again and add another dynamic task list, say with "

".
4. Save.

Observe that the new task list has the same title and the same tasks as task list t00001, even though they were specified with different titles.