Alexa Shows Duplicate Devices? [2019 Alexa Skill, not applicable to 2020 version]

Agreed it’s definitely annoying. However, this thread is about the previous 2019 skill, which has now been Removed, so upvoting this thread doesn’t really do anything at all.

The thread discussing the current skill with the same issue is here:

New SmartThings Alexa skill (2020)