Shattered Aeons setup question

By Carthoris, in Arkham Horror: The Card Game

The rules say to include "the 3 remaining single-sided locations" in the exploration deck. But after removing the six "shattered" locations, I have four. I'm using all four now, but I wonder how to account for the discrepancy. Just an error in the scenario rules?

Oops, I found it: A Pocket in Time needs to come out.