Admin>Concert Details>Seat Plan>Seat Plan Cache

When the seat plan cache has been enabled (the cache creates a memory of the seat plan pages for faster rendering to the visitors browser.) If you are editing products, prices etc you may not see the changes immediately.

In this case then it would be better to clear the seat plan cache:
Admin>Clear Seat Plan Cache will do that for you.
Clear cache will empty the cached pages in the /cache directory

The most common support question i receive is related to the Seat Plan Cache

Those users who do not understand the Seat Plan Cache will see old information .e.g prices and seat names unless they wait for the cache to expire or they Clear Seat Plan Cache and re-cache by looking at the page again.