Strange re-ordering of my root folders

Hello, I've not seen this before (and it's perfectly possible I've triggered this behaviour myself somehow) but since yesterday my root folders have their order changed. Normally Applications is on top followed by Library, then Systems, then User. But now System comes first followed by Applications, then Library and lastly Users. This kinda worries me, could I have a virus I'm thinking? Can anyone suggest what might have happened? (I seem to think I was messing around recently with setting Defaults in Finder's View menu, but I can't remember exactly what I did...) Thanks ahead for any help!(I'm on Sonoma 14.7 on an M2 machine.)