Update: I ditched the Icasa switches and got the Robbshop ones (like you have). Tried pairing in different ways, with factory resets in between. Both manually and by choosing from list:
Sunricher - Single color 4-Group remote - ZG9001K8-DIM Button Controller - Zigbee
But still only 5 buttons (with the RGBGenie button controler). Can you please give me some pointers @mike.maxwell @Yenko ?
I just bought the Icasa ICZB-KPD18S Pulse 8S on Amazon, which I believe is the same as the SR-ZG9001K8. I used the RGBgenie Button Controller driver, but I only get 5 buttons. It is named a Button Controller-5.1. How do I fix this?