If you have a Dual Zone product but cannot see the dual zone control in the control page, check if your firmware is up to date (version 1.30.1) or if your Dual Zone product is in a Group. If your Dual Zone light is in a Group, you need to remove it from the group to have dual zone control. 

To remove light from a group, long press on a group in the Room page and tap on Settings. Tap on the flash icon beside the Group name to expand the menu, tap on "ungroup" and then "confirm". The light will be removed from the group.