Setpoint reverts

I’m having a problem with a zwave CT30 thermostat. When attempting to change the setpoint, the command goes through, but it’s almost as if OH isn’t receiving an acknowledgement from the thermostat, and so reverts (internally) back to the previous setpoint.
You can see below, the third line is where I increased the heat setpoint to 68, which is updated, then updated back to 67. I have a refresh interval of 20 set for that setpoint, so the last line is where that hits and the correct temperature is then reflected.

2016-05-11 11:39:36.655 [INFO ] [runtime.busevents] - HVAC_Temperature state updated to 72
2016-05-11 11:39:42.085 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint state updated to 67
2016-05-11 11:39:46.993 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint received command 68
2016-05-11 11:39:46.994 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint state updated to 68
2016-05-11 11:39:47.561 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint state updated to 67
2016-05-11 11:40:02.017 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint state updated to 68

If I hit the setpoint adjustment arrow twice, the second time, it will update to reflect the actual temperature. You can see below, the second “received command 68” is where OH updates to reflect the setpoint being 68, although the thermostat doesn’t change on the second click because it was already at 68 from the first click.

2016-05-11 11:49:38.435 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint received command 68
2016-05-11 11:49:38.436 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint state updated to 68
2016-05-11 11:49:38.552 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint state updated to 67
2016-05-11 11:49:40.620 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint received command 68
2016-05-11 11:49:40.624 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint state updated to 68
2016-05-11 11:49:40.765 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint state updated to 68
2016-05-11 11:49:41.454 [INFO ] [runtime.busevents] - HVAC_HeatSetPoint state updated to 68

Is there a setting for the device to push status updates rather than needing to be polled? I’m running on a C wire, so battery is not a concern. I doubt it’s practical to poll often enough to get useful status information.

Associations only come in to play if the device is manually changed, correct?
Regardless, the xml file for the CT30 seems to indicate that it should support 1 association group, but I don’t get any listed in Habmin. Is there a way to verify that my device supports them?