By default the Start Menu will automatically arrange your installed programs alphabetically, while this may be the behavior you desire, I know a lot of people who are irritated by it. Here’s how to disable it.
Disable Alphabetic Sorting Of Programs
Right-click on the Start Orb and select Properties from the context menu.
When the Properties dialog loads, make sure your on the Start Menu tab and hit the Customize button.
This will bring up the customization options, scroll down until you find the option labeled Sort All Programs menu by name and deselect the box.
Click ok and that’s all there is to it, you can now arrange your programs as you wish.