When sending a push notification to an individual user profile via the (...) → Send User Push, the target recipient is only one device - which is expected.
However, when going into Messages → Inactive → duplicating the above message, the target criteria does not carry across, and instead defaults to ALL USERS
This is highly prone to mistakes and it also does not follow the typical behaviour when copying PN messages which had a target criteria specified before hand.
A suggestion would be: have the Device push token be part of the delivery Target Criteria. This would improve greatly improve UX.