Thank you for the positive feedback. For only having the ST system for 2 days, you are doing great!
I’m not sure the 8 button does anything on Smartthings.
The buttons must be pressed and held until a beep is head, 2 will continue beeping with increasing volume beeps, 5 decreasing. My Xfinity unit does not get very loud. This is baked into the hardware, not dependent upon any DTH. Should this not be occurring, perhaps it is a defective device?
True night sets the IRIS to use “Night” instant alert mode vs “Stay” delayed mode. I have no idea why is reversed on your system Try saving all child profiles and the main page again, this sometimes cures strange behaviors.