Custom site.yaml blueprint doesn't support more than one fieldset

[thekenshow]

I have a user/blueprints/config/site.yaml file with a single fieldset that was working as expected. With the snippet below, the Location Services fieldset is rendered with the correct fields:

                accessconfirm:
                    type: markdown
                    label: 'Accessibility form confirmation message'                      
                rfpconfirm:
                    type: markdown
                    label: 'RFP form confirmation message'                      

                fieldset:
                  type: fieldset
                  title: 'Location Services'
                  text: 'The text and images below are used across Location pages where provided.'
                  collapsed: true
                  collapsible: true
                  fields:
                    photos:
                      label: 'Service Images'
                      type: file
                      destination: 'user/images/location/services'
                      multiple: true
                      accept:
                        - image/*

When I added another fieldset before this one, the new one appeared but the existing Location Services fieldset was no longer rendered. With the snippet below, the Form Configuration fieldset appears but the Location Services fieldset does not:

                whyworkwithus:
                    type: textarea
                    label: 'Why Work with Us?'                      
                fieldset:
                  type: fieldset
                  title: 'Form Configuration'
                  text: 'Customizing the Contact and other forms.'
                  collapsed: true
                  collapsible: true
                  fields:
                    contactconfirm:
                        type: markdown
                        label: 'Contact form confirmation message'                      
                    applyconfirm:
                        type: markdown
                        label: 'Application form confirmation message'                      
                    accessconfirm:
                        type: markdown
                        label: 'Accessibility form confirmation message'                      
                    rfpconfirm:
                        type: markdown
                        label: 'RFP form confirmation message'                      

                fieldset:
                  type: fieldset
                  title: 'Location Services'
                  text: 'The text and images below are used across Location pages where provided.'
                  collapsed: true
                  collapsible: true
                  fields:
                    photos:
                      label: 'Service Images'
                      type: file
                      destination: 'user/images/location/services'
                      multiple: true
                      accept:
                        - image/*