Consider this - maintenance and protection of Hillary is done through tight control of her appearances - she says when and where she’ll be, and often arrives late and leaves early. Why? Because she can and does have seizure attacks at any time, especially when under performance stress.
But the 911 ceremony was fixed - date, time and place, and she HAS to be there. No getting around it. Which all by itself raises her stress level, which can also trigger attacks. So going into 911 her team knows there’s a high probability of an attack on that day.
So they prepare for it. She rests up, is highly drugged, is surrounded by a medical team, Chelsea’s mini-hospital is prepped.
And the second body double is waiting at Chelsea’s, while the primary body double is deliberately scheduled for a performance in LA, for deniability.
Then, on 9/11, the show begins...
“And the second body double is waiting at Chelsea’s, while the primary body double is deliberately scheduled for a performance in LA, for deniability.”
If you add that to the fact she was taken to Chelsea’s instead of a hospital (hospital is SS protocol), it’s easy to make some sense of all that happened. Have the impostor stashed at Chelsea’s “just in case”. Turns out, it was necessary.