Storage of new bookmarks in Safari

Hello,

since a few days, I don't know if it is related to my recent upgrade to High Sierra, all newly saved bookmarks in Safari will only be saved at the bottom of the list (e.g. favorites). With my number of bookmarks, it's really annoying to have to scroll down until you get to the new bookmarks. I can't find any hints on how to switch it back to "normal". Maybe I pressed some cryptic keyboard shortcuts, but I can't undo them, seemingly I'm too stupid for.........

And: I know how to move bookmarks and I know about the existence of folders, that's not my problem.

Thank you for your help

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