Hey Jaime,
If you look at this following link – https://theeventscalendar.com/knowledgebase/admin-roles-and-permissions/
You’ll see there are permissions for the following:
– Event Capabilities
– Venues Capabilities
– Organizer Capabilities
However there is not one for “Ticket Fieldset Capabilities” and its inheriting the generic wordpress ones for ticket fieldsets
i.e.
edit_published_pages
edit_published_posts
Therefore modifying any permissions in the members plugin is also modifying permissions for them to do posts etc