Different Developer Sites? Sync issue?

You need to know the SHARD that your Location is hosted on. It is very important!

This method works:


You can “accidentally” create your own custom Device Type Handlers and SmartApps on any SHARD and that would be a mistake, because then you can’t “publish for myself” and install into your Location.

Therefore, until further notice from SmartThings, know your SHARD URL and always login explicitly to it!!!