Ok, this is what i don't understand? please someone help me.

As it turns out, she was not a teacher. Nor does it appear that Nancy Lanza had been a substitute or a teacher’s aide at Sandy Hook Elementary School, as some reported. Other accounts said incorrectly that she had been killed at the school along with her students, rather than at home before her son’s rampage at the school.

“At least one parent said Lanza’s mother was a substitute teacher at the school,” the wire service said. “But her name did not appear on a staff list. And the official said investigators were unable to establish any connection so far between her and the school.”

[link to www.standard.net]

So why did the nurse in this video also say she was a teacher? (the nurse that couldn't be found on record)