<div data-hook="admin_shipping_matrix_form_fields" class="align-center row">
  <div class="alpha four columns">
    <%= f.field_container :name do %>
      <%= f.label :name, Spree.t(:name, scope: :shipping_matrix) %> <span class="required">*</span><br />
      <%= f.text_field :name, class: 'fullwidth' %>
      <%= f.error_message_on :name %>
    <% end %>
  </div>
</div>

<%= f.field_container :name, class: ['align-center'] do %>
  <%= f.label :name, Spree.t(:name, scope: :shipping_matrix) %> <span class="required">*</span><br />
  <%= f.text_field :name %>
  <%= f.error_message_on :name %>
<% end %>

Remove container div’s for this single field so it aligns centrally
Remove container div’s for this single field so it aligns centrally