The new interface in iOS developer portal no longer has the Generate New button for your app ID. In its place is a \"Use Team ID\", which will result in the same seed ID being
I find this from ios developer library page, it's said:
Choose a bundle seed ID from the pop-up menu. Use the team ID unless you have an existing app (with a different bundle seed ID) that needs to share data
For further details, you could refer to http://developer.apple.com/library/ios/#documentation/ToolsLanguages/Conceptual/DevPortalGuide/CreatingandConfiguringAppIDs/CreatingandConfiguringAppIDs.html