In the ISY Alexa portal you enter the trigger phases for your various scenes. The portal forces those phrase to be unique. So I have to enter "red bath" and "blue bath" to achieve two unique phrases.
I have the red bath light assigned to the red echo group, and the blue bath light assigned to the blue echo group. What it I assigned both the red and blue devices the phrase "bath"? Then the "red echo" should look in its group devices for one with the phrase "bath" and find the correct light.
Who is enforcing the phrases to be unique? The ISY portal or Amazon?