Yes, that’s a requirement. The keypad was manufactured by Centralite. BTW I’ve read someplace on the community site that older Iris keypads don’t work with ST, must be newer version.
Could be, but from what I understand not possible
No idea
That’s an indication that routines are not set in Keypad modue Globals, or the routines are not setting ST state and SHM mode. See instructions for Keypad Troubleshooting and How to use this app with lock manager in SHM Delay instructions