The measured response is largely the room. The sub probably measures OK. The dip in the response at is probably the distance difference from the port to the woofer, or maybe the port is over-represented. If you want to be sure, do a near-field measurement of the port (like 1 or 2 inches) and then a near-field of the woofer. That should at least tell you if one of them is misbehaving.
