Edit Page view TOTALLY different then on web

Hi,
I know that here is a lot of vise/smart people therefore you will solve my problem with in couple minutes.
On my web https://www.majcgenealogy-slovenia.com/how to start I’m adding some small pictures and text. So far so good.
BUT when I add wider picture and small text AND then another new picture, this last picture in edit page is “next” to previous picture and not bellow previous picture. So in Edit Page everything is “mixed” up.
I would like to send/show you print-screen so that you will see what I’m talking about.

Thank you for you help.
Ivan