A little update....
After engaging with ZebraBlinds.com support they informed me I was on an older firmware version for my blinds (v11.2) and there were some improvements to Z-Wave group messaging in their 11.3 version.
I was able to confirm I was on firmware V11.2 using the basic Z-wave Tool.
Zebrablinds recommended I get the Homeseer zwave flashing tool and then provided updated firmware. The upgrade process went seamlessly and all my blinds are now on the new firmware.
After the firmware my issues have been resolved. I'm using the generic Zwave shade driver and all blinds are responding to automation and grouping. Very happy after months of frustration.
