Hi Demi,
You would want to go into your existing child records in your table that you are summarizing up from and edit them to make sure each child record has a Parent Assigned. You can figure out what field this is by looking at your relationship between the Parent and Child table, it will list the reference field for that relationship which has to be filled in for the relationship to function. If you are having issues with this I would suggest putting in a support case so that you and a rep can look at your relationship and records together as there might be some disconnect that is causing the issues you are running into. You can create a new case in Quick Base if you click Help in the upper right hand corner of the page when signed into Quick Base > Manage Support Cases > + New Support Case. If you are still having issues getting Parent and Child records to sync up they can help look at the relationship with you and identify what is causing those summary fields not to bring up your data.