Letting people who have had contact with infected persons is just insane; that's how exponential infections take off.
Late response to an exponential growth is a total disaster. You can never catch up. If you're not a generation ahead of the disease, you're doomed.
Quarantine should have happened with this guy when he went to the hospital the first time. From Liberia, with a fever, should have caused the triage nurse to immediately isolate him in a negative pressure room if possible, and no one else approach him without full protective gear.
Lock down the waiting room, and get ready to isolate and monitor those there.
Even after it was known that he had Ebola, people without protective gear were trapsing in and out of the apartment before it was sanitized. It’s just been a total screw up from the git go.
Quarantine used to mean no one in or out. Not well we make exceptions when we want to.