I got the same response as you; the widget can only get back the heating or cooling set points, but not both at the same time and when you go to the Ecosytem screen and test the other mode, it then only works for that new mode. I planned on eventually using nevo widgets for this purpose (I sometimes use the RCS z-wave thermostat), but I can't make it work the way it should either.

The alternative, and what I've done before NevoStudio Pro 3.0 came out, is to use only the heating and cooling set point pieces of the "HVAC #1 - Auto" module that you find in the Home Control tab. Just drag that module onto the interface, delete everything else besides the blue and red texted pieces and then associate the "Thermostat Setpoint Get" command to them (double click both pieces to make sure the Configuration Parameters tab settings are correct). This will allow you to get the correct heating and cooling set point values back. The only issue with this though, is that since it is outside of nevo widgets, I don't see how you'd be able to use that data in the widget for other purposes.