Option to reorder task lists within milestone is not available. However, reordering the task lists in Tasks & Milestones − −> Tasks section will be reflected within the milestones, too.
Dependency can be set only between tasks, that too within the same project.
You can see all the overdue milestones across all projects from Overdue Milestones section on the Home page.
If you want to see all the overdue milestones for any particular user, make use of the Filter option available in My Milestones section.
Go to Tasks & Milestones section of the project. Click Milestones link to view all the milestones in that project.
If you want to view only the archived milestones, select Archived Milestones from Milestone Type drop-down.