Special cases:
- If the admin adds a new block to the template, it will be inserted in the same place in the spaces. If the location can't be detected because the surrounding blocks have been deleted or moved, it will be added at the bottom of the space.
- If the host has made changes to the **same** block, the admin is updating, and the admin's changes will override the host's changes.
- The admin's changes never remove changes made by the host unless it is in the same block(s).
- If the host has deleted the block that the admin is updating, the block will be inserted again at the bottom of the space.
- Spaces duplicated from spaces created from templates will not be affected by changes in the template.