Did you edit a template now all of your templates are changed?
All email templates are generic, not linked per photoshoot so if edits are made to one photoshoot it will apply for all shoots. Below are the dynamic tags to add to your templates if they were removed so that the app will automatically add in photoshoot data.
(your name) - photographer name
(date) - photoshoot date
(time) - photoshoot time
(location) - photoshoot location
(insert balance amount) - photoshoot remaining balance