In the second part of the two part show "Home Again", Albert and Charles are in Mr. Edwards cabin as Albert is going through withdrawal. In one scene, he gets the shakes and then throws up all over himself. In the next scene, the shakes start again and his pants are completely clean.
Throughout both the first and second part of this episode, the writing on the window of "Nellie's" Restautant keeps changing back and forth between "Nellie's" and "Caroline's." This can be seen changing nearly every time the scene changes back to the restaurant.
Mr Edwards' old cabin had been painted pink in a previous season.
Morphine usually has to be injected so it is unclear what effect drinking it has. The powder form was called heroin.
When Albert sneaks into Dr. Baker's office in the middle of the night, Dr. Baker turns a knob on a flame lantern and it lights up on its own. He would've had to light a match and hold it to the wick as well.
When Albert has his first withdrawal attack and starts screaming, Charles runs over to comfort him. You can see in the window behind the bed that it's daylight out, but when they go outside, it's night.
No mention of where Edwards stayed while Charles and Albert took over his cabin. Or why Charles didn't just ask Carter to use his old sodhouse instead.