Cute story with flying cars and "Her" reprieve

Rating: 4/10 (27 January 2018)

Ok I missed something. They restart making Tyrell corp making replicants and some of the new replicants are now the Blade Runners to hunt down 1st gen replicants.
Wasn't the whole point of the original blade runner was that the 1st gen replicants had a built in death date(except for Rachel)??? They should all be dead by now?
So the new Corporation is desperate to find the baby because they feel the baby would be the key for Replicants making Replicants and is a good thing. And the underground Replicants want to find the baby to protect the replicant race. And the blade runner is working under direction of the police is charged to find and destroy the baby to avoid the baby being a martyr for the Replicants.
If that is the gist of the movie then why is the new corporation helping the Blade Runner with old records and investigations of the Replicants. I guess ultimately the Company did kill the police chief and was using the Blade Runner as a rabbit to track him to the child. It just seems that in the end they are both working towards the same goal to find the child to save her. So why were they fighting?
Rough story line that just seems forced.