Looking at your template, here is what I see: the itm repeating section is part of a Choice group, where you have the choice of label (a group) or itm. When itm is bound to a choice group rather than a repeating section, I have the option of customizing the commands for the section. To replicate, grab the Choice group in your schema that hold label and itm and drag it to your form. Find the choice section related to item and when you double click it, you'll see the Choice section properties window opens and you have the option to customize commands.
Is having label or itm as a choice an intentional design decision? If not, you may want to modify your XSD.