Developing the pictures in the darkroom, the camera guy tells Jimmy and Kim that "you can't rush the process." That is correct, but they have obviously enlarged a lot of negatives already. They are in a hurry, and they took a lot more pictures than they actually need. Manual enlarging takes a lot of time, which makes that step the bottleneck. In reality, they would try to avoid enlarging as many negatives as possible by selecting the best pictures beforehand and only blow up those few. For that, you would first make a quick contact print of all the negatives, and go over that with a loupe, not select a few prints after enlarging all the negatives.
The cans of Schweppes ginger ale at the HHM boardroom are the post-2012 variant; the scene is set in 2004.
The bottle of Macallan that Howard brings has the newest design of Macallan bottles (After 2017) not available in the time this series Is set.
Older bottles of Macallan available in the past ,were with a quite different design, no plastic stopper.
Lalo Salamanca is seen walking through a sewer system. However, Albuquerque does not have a traditional underground sewer system that people can walk through.