We're talking in circles because I understand all of these networking principles including static IP assignment outside the DHCP range, DHCP reservations, port forwarding etc. --- but the following issues remain:
1. The iPhone app fails downloading configuration and Lutron tech support tells me this is because the programming must be set to use a static IP inside the Lutron device. Logically it doesn't make sense why it wouldn't also work with DHCP inside my own network, but that's the way it is. That's the way it is designed, feature or bug.
2. Lutron locks down the settings so they're accessible to dealers only, so I am frustrated I can't try out the static IP setting until I wait for the dealer to come back.
3. I have to be careful making changes to my home network since I can't change the Lutron static IP settings myself.
4. All my other devices -- DirecTV, web-enabled dishwasher, etc. etc. let me change its static IP setting, those companies trust the user to touch basic settings.