Hi
The version is osTicket v1.9.8.1 (stable).
The template I'm talking about is the End-User in the path that you mentioned.
New Message Auto-response
Confirmation sent to user when a new message is appended to an existing ticket.
New Ticket Auto-reply
Canned Auto-reply sent to user on new ticket, based on filter matches. Overwrites "normal" auto-response.
New Ticket Auto-response
Autoresponse sent to user, if enabled, on new ticket.
Response/Reply Template
Template used on ticket response/reply
When a End-User submits a tickets, he receives the New Ticket Auto-response, when an agent responds to a ticket the End-User receives the Response/Reply Template
Thank you again