The name you refer to is the name of the root collection which, by default, is the same name as the dataverse when initially created. If the dataverse name changes, it does not automatically change this name so you will need to change it manually.
To change the name of the root collection, browse to the dataverse in question, choose Options, Manage Collections, then click on the collection name you want to change. Save your changes and it should be all set.
Kevin