Even if an entry in a death certificate or other record appears to be incorrect, keep in mind that, on the surface, it can be hard to determine what's right and what's not.
A relative's death certificate listed her "mother's maiden name" as "Mrs. Little." Confusing--and I originally thought that maybe the "mother" had married after the father's death and that "Mrs. Little" was her name at death instead of her maiden name.
Turns out Liddell WAS her maiden name.
And the "Mrs." reference? Who knows. It easily could just have been an error.