All tasks are sorted by the date and time when they were added. Each new task is added to the end of the list.
The tasks are organised in pages. Each page contains eight tasks.
As you turn pages, the next page (right, '>') will take you to the newer tasks. Long press '>' to go to the very last page.
You can also use the Go to page from the Toolbar (bottom) menu to go to a particular page.
Additionally, from there you can navigate directly to the where the last selected task is (useful if you want to continue selecting from the last selected task).
When a step of a task is completed, or when you duplicate a task, the new step is added at the very end of the list, the last page.