Joel, Dina, Ellie and Jessie all arrive on a horse at the lodge. When they ride back to Jackson there are only two horses.
When the inhabitants of Jackson fire their rifles at the zombies bullets can be seen scattered on the ground. But in the next shot the floor seems empty again.
Ellie takes some of the weed from the makeshift 7-11 marijuana nursery. However the plants have not been properly tended to, they are dead with brown leaves and covered in mold, it would not be fit for use. When the plant dies the CBG, THC-A and other cannabinoids in it start to quickly degrade, the degradation is rapidly increased by exposure to light, oxygen, moisture and mold, after the plant dies it will only have useful amounts of cannabinoids for a few weeks; if the leaves have turned completely brown, or have black mold, they are not usable. Even leaves that have been harvested and stored in air tight containers have a limited shelf life, THC naturally breaks down over time, losing about 16% of its potency after 1 year, 26% after 2 years, 34% after 3 years, and 41% after 4 years. Since a minimum level of THC is needed for any noticeable effects this gives properly stored leaves a shelf life of 1-2 years depending on the strain's THC levels, and ambient temperature & light exposure.
When they arrive at the Manor from being out in the cold snow, their clothes are all of a sudden dry and clean within seconds of entering the property.