Some teachers may see old pages appear at the moment of editing their sites using School Loop Standard.
With the objective of minimizing any training necessary on the teachers, SchooLoop maintained the original interface for user sites so they can keep working as usual. Assuming their school has converted and published on SLS2, their sites will be displayed with the new look at template after they click Publish and go to their site's live view.
Going forward, SchoolLoop is working on creating an updated interface for users. SchoolLoop will provide plenty of resources and notice before that transition occurs.