Theme broken after last update

Thanks!

It’s strange because I have not touched and the first display bug (layout) is gone?!
Are you sure you have not touched anything?
Because it is normal Multi News is not selected in “GD compatibility settings”.
The reason is that I renamed the template name Multi News and when I save the settings for the compatibility file, it is renamed to NewName_custom.

Anyway, please to end this, could you tell me how to improve the display of the ADD LISTINGS dropdown menus? (dashboard => right sidebar)

Mozilla Firefox: When I click on a menu that makes it unusable.
With Google Chrome: I do not know what change CSS do to correct the height.

Look screenshot included.

URL example problem (domain name indicated above): /tournois/

Thank you in advance for help fixes.

Thanks for the info Guust.

But the main problem is still present.
You can test by going to the link, and press F5.
Then click one of the select dropdown menu (from right sidebar) to add a listing.
They do not work and they disappear (tested on multiple browsers)

I guess that is not correctable with CSS?
How to fix this please?

Thanks in advance.