@EmmJ On the general lists settings, ensure you have Display Name Property defined for the list. With number lists, the list item behind the scenes is a # but you have the ability to define a Text field to be used to display the desired name.
See: https://help.anaplan.com/54b75174-848f-482b-a051-a9a063ece50c-Numbered-Lists for more information on numbered lists.
