The Last Woman on Earth (1960) 
Directed by Roger Corman 
Cast:
Betsy Jones-Moreland .... Evelyn Gern 
Antony Carbone .... Harold Gern 
Robert Towne .... Martin Joyce

Eve, her husband, Harold; and their lawyer friend, Martin, are skindiving
while on vacation in Puerto Rico. When they resurface, they gradually
conclude that an unexplained, temporary interruption of oxygen has
killed everyone on the island - maybe in the world! 71 Minutes
Goofs for Last Woman on Earth (1960) 
Continuity: Despite the fact that all oxygen was supposed to have run out, two birds can
clearly be seen flying past when the three survivors first go down to the beach.

The Last Man on Earth (1964) 
Directed by Ubaldo Ragona & Sidney Salkow 
Cast:
Vincent Price .... Dr. Robert Morgan 
Franca Bettoia .... Ruth Collins 
Emma Danieli .... Virginia Morgan 
Giacomo Rossi-Stuart .... Ben Cortman 
Umberto Raho .... Dr. Mercer 
Christi Courtland .... Kathy Morgan
Dr. Robert Morgan is the only survivor of a devastating world-wide
plague due to a mysterious immunity he acquired to the bacterium while
working in Central America years ago. He is all alone now...or so
it seems. As night falls, plague victims begin to leave their graves,
part of a hellish undead army that''s thirsting for blood...his! 86 Minutes
Goofs for The Last Man on Earth (1964) 
Continuity: The first time Morgan goes searching for corpses to incinerate, he puts a man and a woman into the back of his station wagon head first. When he arrives at the garbage dump, the woman is now lying feet first in the back of the car and has switched sides with the man.

Errors made by characters (possibly deliberate errors by the filmmakers): The newspaper headline has an apostrophe typo: "Is Europes' disease carried on the wind?"

Continuity: In the flashback sequence where Morgan takes his wife's body in his car for a secret burial, the shots of him inside the car driving shows that it is night or pre-dawn. However, the exterior shots of the car moving along on the road show that it is already daylight.

Continuity: The first station wagon Price has (a Chevy) turns into a Ford (look for the 4 headlights) and back to the Chevy (2 headlights). He eventually ends up with the Ford after the zombies wreck the Chevy.

Continuity: In one of the first shots of the deserted city, smoke can be seen billowing from one building's chimney.

Continuity: When Robert Morgan is outside the grocery store, the reflection of a passing car can be seen in the grocery's windows in the upper left-hand part of the screen.

Revealing mistakes: When Robert finally catches up with Ruth after seeing her for the first time you can see vehicles driving around on the streets below the hill.