Ecobee and Google Assistant

Anyone experiencing this issue. When I ask the GA to change temperature or lower temperature, the GA change the cold and heat temperature to where the average is what I asked temperature to be. Let me explain:
current temperature 75
current temperature set to: Cold 76, heat to 68
I want to lower the temperature to 74, so I ask “Hey Google, set temperature to 74”.
then google sets my Cold side to 78 and heat to 70.

why is this happening?