If I change a Helper layout, will it change where it's used?
No. Helpers are coupled with the page once placed. Changes to the Helper layout will not affect existing instances.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
No, you cannot layout forms with Acquia Cohesion.
You can style tables or forms through the use of base or custom styles.
Google maps may not be showing if you have not set a Google maps API key.
HTML is escaped when using Drupal tokens in Site studio as a security measure, this follows Drupal core.