Ashan,
The event still Month Long even in Troubleshooting Mode:
https://www.feuerwerk-kalender.de/?ajde_events=32-internationaler-feuerwerk-wettbewerb-hannover-malaysia
Replies for tickets on suppota
Hello,
Thank you for your messages, I am going to assign this ticket to Ashan and he will be able to take it from here and find you a solution. Please allow some time for him to get back to you, we greatly appreciate your patience and thank you for being a eventon customer! Also please disable any IP blocking on your site if there are any.

Here is the scrrenshot for the point number 4.
I updated and the problem could be solved. Bu now all new events are shown as full month events even the setting is different – see Daes in May for Hannover
Sorry I forgot to send you screenshot:
https://postimg.cc/gallery/MBnYCSB

Sorry, the green arrows in the image are wrong. It is the left Side/first image and on the End the right side image (here not shown)
!!!!
I fond it, maybe a bug?
In the first event the title was shorter than in the others. This shortened the box.
Maybe this can be fixed in an update. For now I just entered a longer text.
Hello,
We are glad your issue is resolved, if you have any further questions or concerns please feel free to create a new ticket.

It ist the first or the last image.