Todo Mobile Android action items
How do you add/ edit a note to a task? Is there a way that you can collapse the sub tier tasks under the major like you can on the web version? It seem in the only way to add a task it ends up at the bottom of the project
if you're referring to our Todoist Mobile site http://todoist.com/m - unfortunately, it doesn't have an option to add, edit or see task notes, but we will certainly consider adding such feature in our upcoming Android App in the future.
As for your second question - a newly added task will indeed end up at the bottom, however you can use the "Manage tasks" button at the bottom which will allow you to reorder your tasks and drag it to a different position. In order to indent a task, simply choose the indent level when adding or editing a task. Indent level 1 is the default level for a main task, level 2 is a sub-task and so on up to level 4.