Thanks for becoming part of the Community, DL95.
QuickBooks pulls in transactions based on the data provided by your bank. Since your transactions for a credit card account with three card holders on it are coming in unseparated, I'd recommend getting in touch with your financial institution to see if there's any particular set up they can use to send them separately.
I've also included a couple detailed resources about working with bank transactions which may come in handy moving forward:
If there's any additional questions, I'm just a post away. Have a lovely Tuesday!