B757 first officer reported multiple data link updates with incorrect weights resulted in manual input for corrected final weights. First Officer reported that load planning failed to correct entry error.

Narrative

Received the final weights normally and they were as expected. Received the performance datalink uplink but those numbers were off by about 40;000 lbs. it appeared that the actual takeoff gross weight had gotten put in the zero fuel weight box which then pushed the gross takeoff weight much higher than it should have been. We messaged dispatch and asked for a new uplink. Also talked to the station who then called load planning. The next uplink had the same error. The actual final numbers were confirmed and matched what the flight plan was based on. We ended up manually entering the numbers into the FMS. Flight proceeded as normal.We messaged dispatch.