When Sam follows Frankie to the AA meeting, it's the middle of the day after Frankie took Josh home. Yet, when they first speak, outside the AA location, it's well after dark.
In the very early stage of the movie Sam enters James room. You can see from the window which Sam sits by that it is night time, but they leave the building it is morning time.
Josh opens the door to their apartment with the key in the deadbolt, but doesn't turn the key for the deadbolt until after he opens the door a few inches. You can hear the sound of the deadbolt turning after the door is open.
When Sam and Frankie are doing the laundry Frankie's necklace is in her shirt, the camera switches to Sam and back to Frankie again, now the necklace is on her shirt.
When Sam and his mom are sitting on the couch, after the operation of Lillian, in the camera shot from the left she rubs her head with her fingers. Then the camera shot turns to the right, in this shot she isn't rubbing her head.
When the sodium is thrown into the pool it sinks to the bottom before exploding. In reality sodium floats on water and the explosion is caused by sparks igniting the hydrogen that is formed.
About 1.5 minutes into movie Chris Pine says "There's a market for everything Phil Weyerhaeuser Paper...." Pine pronounces the company wire-heiser, when it is pronounced ware-houser.