get + object + mixed up

[Listenever]

[Professor] Binns droned on and on while they [students] scribbled down [historical] names and dates, and got Emetic the Evil and Uric the Oddball mixed up. (Harry Potter and the Sorcerer's Stone)

What does the highlighted part mean?

 

[cyberpedant]

They incorrectly attributed the names and dates of one to the other.

 

[london calling]

Emetic the Evil and Uric the Oddball are names (of wizards, I imagine). To get (something/someone) mixed up with (something/someone) else means to get them confused.

Have you seen these threads?

get themselves mixed up
Get/make sombody confused - Mixed up
To be confused-to get mixed up