Try this to resolve the issue, I really should've done this instead of fetching the session username. Edit the plugin 'vB RPN: Send Rank Notification', find:
PHP Code:
$pmdm->set_recipients($this->registry->userinfo['username'], $fromuser['permissions']);
Replace with:
PHP Code:
$pmdm->set_recipients($this->fetch_field('username'), $fromuser['permissions']);
Save the plugin, manually edit Owen again and see if Owen gets the PM rather than you