I-797C Notice of action - Parents and Brother

[KforKarmi]

I have recently filed I-130 for my mother, father and younger brother.

I received I-797C receipts today. My brother's I-797C has priority date, my alien number, my birth date, receipt number, preference class and beneficiary name, birth date and country on it.

While parents I-797C don't have even their names, it has following

receipt number,
uscis account number
case type
received date
priority date
applicant - where my alien number and name is written
notice date
my address
notice type -
online access code

Is this normal??

I just think that at least it should have name of beneficiary. I am not sure which one is for my mother's and which one is for my father's I-797C.
Please advise if you have any experience or have knowledge on this area.
Shall I contact USCIS for this?

Thank you,
Karmi