Within Teamwork Projects, you can choose how your task lists are ordered in the project's Tasks view.
In your project's Tasks area, click the options (three dots) button near the top right. In the dropdown menu, hover over Sort Task Lists.
Here, you can choose to sort your task lists by:
- Task List Name
- Number of Tasks
- Date Created
- Milestone Name
- Milestone Date
More information on task lists can be found here: Task list options