Unfortunately, Launchpad is currently incapable of knowing that Ubuntu and the various -backports projects are related (bug 30419). And if it did, they'd probably be handled as part of the same Ubuntu project, rather than as separate projects in a project group.
Unfortunately, Launchpad is currently incapable of knowing that Ubuntu and the various -backports projects are related (bug 30419). And if it did, they'd probably be handled as part of the same Ubuntu project, rather than as separate projects in a project group.