Component DC_PENDITEM_CI not loading Multiple Items through Excel to CI

We need to configure Excel to CI template to upload Multiple Items under single Group ID,

We are using component Interface DC_PENDITEM_CI to build the template, but this CI not giving us capability to add multiple Items under single group id.

Only way we figured out is to upload multiple items is by Using - Insert New child option. We want to build the template to enter data vertically stepping down a row versus having to extend the width of the template built out on a single row for new sequences/items.