Music recommeder never received email?

Hi everyone,
I submitted a music supplement as part of my Columbia RD application. However, the reference I provided (my music teacher) says she never received an email from the admissions office, and has not had to submit anything to Columbia.
I thought references were supposed to receive an email asking them to confirm that everything on the supplement was true, so is this a bad sign for me? Or is it alright that she didn’t need to confirm anything? Is anyone else in this situation?
Thanks in advance for your inputs!!