Is there any reason that characters who have been killed by non headshot means are listed as Dead rather than Undead? Since its assumed that they will reanimate.

Carley or Doug (Determinant) whichever was killed in Episode 1, David or Travis (Determinant) whichever was not brought back to motor in, and Kenny in the Video Game

Otis, Patricia, Jimmy from the TV series, along with others I missed.

Is there a reason they are only listed as Dead?