I would call the CBP, this doesn't seem right.
Let's look at https://www.tsa.gov/travel/frequently-asked-questions/what-are-cbp-passid-and-known-traveler-number-0
Your PASSID is your Known Traveler Number
you must add your PASSID number in the KTN field when making airline reservations to ensure the TSA PreCheck® indicator appears on your boarding pass.
Do my Global Entry benefits extend to my travel companion(s) (children, spouse or co-traveler) who is/are not part of the Global Entry program?
Global Entry benefits are member specific and cannot be extended to others.
So this just doesn't mesh together. If your PASSID were the same it would extend benefits to each other. Call the CBP -- but make sure you read those numbers right.
Secondary source: https://slate.com/human-interest/2020/01/tsa-precheck-couples-divide.html it does happen that only one half of a couple has TSA Pre.