When Captain Archer generates a subspace implosion by overloading the reactor, the first explosion occurs at the bow, but engineering and the reactor are in the aft half of the saucer.
After being struck by a powerful spatial anomaly, T'Pol is trapped under what is supposed to be a very heavy piece of the wall that pins her leg so that Archer must save her. Unfortunately, the "heavy" wall bounces three times before settling, clearly showing that it is actually quite light as to not break the actress's leg.
Dr. Phlox left Enterprise for Denobula many years before the future events in this story. But when he returns to treat Archer there is no Medical Officer in evidence and no sign that anyone else is now running the sickbay.