Negan wipes the bloody ax on Rick's jacket (right shoulder) while they are in the RV. In the following scenes, the blood is not on his jacket.
Blood splatter on Rick's face changes throughout the episode.
When Rick is outside the camper trying to get back in, he kills numerous walkers, including one which he bashes the head into the back of the camper underneath the tail light. After Negan lets him back in and they are driving back to the camp, the blood stain is gone.
In the finale to season 6, Daryl is noticeably hurt after being shot in the shoulder, and hardly able to move, yet in this episode, he has enough strength to get up to attack Negan. Then after Dwight throws him into the van, Daryl's injury seems to have quickly improved.
The amount of blood on "Lucille" (Negan's trusty baseball bat) changes frequently between takes.