To change the allocation of your ticket you need to do this via the promotion centre. Head to ‘Manage events’ located on the grey header at the top of the page, click on ‘View my events overview’ then select the event you wish to amend the ticket allocation on.
Once on this page scroll down to the bottom of the page where you will see ‘Your ticket sales’ Select the cog symbol underneath the ticket sold section.
This will bring up a summary of all the tickets you have listed for this event. Here you need to select the ticket you want to change the allocation on. Once the ticket is highlighted, you can adjust the allocation in the ‘change ticket total’ box on the bottom right-hand side.