Switching to V3 created duplicates

[Dannodapter]

After receiving the V2 Amazon notice of sunset I enabled the V3 skill.  I removed the V2 first.  After doing this I ran device discovery.  The problem I'm having is that Alexa created a new device for any alternate spoken word. What happens with numerous devices is Alexa says "A couple things share that name, which one did you want?  I then repeat the same thing and she turns the light on.

Looking in Alexa the only option is to disable a device and then I lose that ability.  It seems there is no option to remove all devices which I thought might work if I then searched again.  I did try removing the alternate for 1 device and running discovery. This worked and the duplicate device was removed. I don't want to lose that ability but it is also time consuming. 

I was thinking about saving my ISY data > removing everything > Alexa device discovery > restore ISY > run discovery again. 

I imagine many do not use alternate spoken commands but has worked flawlessly when for example someone says turn on kitchen ceiling and another says kitchen over head as an example.

Anybody else run into this?