If I look on your settings, there is one problem in Object Sections. F3 contains also seat 1, it is wrong (seat 1 is already used for section 1).
Also you have 3 rows and 3 sections. So you want every row as 1 section? But you have only 12 seats per row and first row contains also seat 13 and 14.

I am not sure that this also make a problem with missing spaces between seats, but can you try to reset your section settings?
You can make 1 test section with missing seats 4, 11, 16, 23, 28, 35.

Or if you use 14 seats per row, missing seats will be: 4, 11, 18, 25, 32, 39

Maju, it´s crazy.... i put correct numbers but when i apply it´s change...
i purge cache but it still putting this numbers..

Can you send me account credentials to your backend (administrator part of site) so I can check it? My email is: Tato emailová adresa je chráněna před spamboty, abyste ji viděli, povolte JavaScript

send email

Ok, thank you. I have same problem on your site. We will try to analyse actual eTickets code and when we find a solution, we will post it here.

Unzip advanced.zip and save advanced.php to {project_root}/components/com_vmeticket/views/ticket/tmpl/seatsselection/

Data from database have a little different format in version 2.1.1. This file (plugin) is modified so new data format will be read correctly.