Thank you for your answer.
What I’ve done :
Bad News :
1/ Change my theme (switch for Twenty thirteen => Same bug
2/ Disable all plugins (except Event Calendar, Calendar+, Tickets and Tickets+, Woocommerce) => same bug
Good News :
I know how to replicate the bug !
1/ Add new event
2/ Create a new ticket, with the option “Share capacity with other tickets” => and put 10 for example. and save the event
3/ Modify the ticket with the option “Set capacity for this ticket only” => 10 for example, save your ticket and the Event,
In the list view you got 20 tickets ! But if you click to see the Event, you only have 10 tickets available.
The only way to have the good informations displayed is to delete the ticket and create a new one, with the “Set capacity for this ticket only” option.
Can you replicate this ?
Didier