Child Categories in cmdb_model_category table sync up

[SnehaSaran15]

In the table cmdb_model_category, if we make child categories record  then in the related list Child categories it is showing all the records in the cmdb_model_category table not just the relevant data. How the syncup is happening , anyone has idea ?

[Mark Manders]

Can you share a screenshot of what you mean? 
OOB there isn't a 'child' related list, so it feels like it's custom and to assist on that, we need more info.