Here is a very interesting tweet from Adam Horowitz concerning outsiders and the formation of SB in 1983. Owen and Ben could be witnesses of the town’s creation.
Also, anther tweet makes me think Greg’s HER might just be another character who came from another world and wasn’t affected by the curse: 
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"That’s how you know you’ve really got a home. When you leave it, there’s this feeling that you can’t shake. You just miss it." Neal Cassidy