Hi Shelley,
The new event moving window being introduced in 15.1.10/15.0.17 only affects the event date, and the related entitity dates, like MOS, pricetype, offers, and a few more. The purpose of the window is specifically suited to moving the performance itself, not adjusting any orders or existing tickets for the event, or changing the seat map. The seat map can still be changed using normal tools, just not from the new window that affects the dates.
The seats and tickets already assigned would still work, so they wouldn't need to be reissued unless patrons needed to be move or re-seated
Chris Szalaj
Product Owner, Business Facing Products
Tessitura Network