Funny Colour Coordination

[snakedog116]

I have 2 zigbee coloured LED lights that are linked with this smartapp.

1. When I change the light temperature it works fine.
2. When I change the first light's brightness the second light turns blue/purple instead of changing brightness.
3. When I change the first light's colour the second light is unchanged.
4. turning the light on and off does work fine.

This looks like a very promissing app, but right now it just doesn't seem to work for me.