No, was actually stale.
I've changed the flagging of it.

On the web it was an immediate orphan coz it was already stale, but any block submitted that isn't worked on is auto-flagged as orphan until I manually check everything then flag it.

I've looked through everything to be sure, but yep it was a stale share.
The share came into the Silicon Valley node at 2017-08-10 20:28:30.533 UTC
But all nodes and the main pool had already switched to the poo block by then.