I use the format of YYYYMMDD(file number).nef when importing photos. And I have Lr arrange the photos in order of creation (or by filename). This last import, Lr jumbled up the order of the photos in the Library? I have no idea what the new order is, or how to go back to my preferred method.
Oh, I have a Nikon D5000, and my laptop is a MacBook Air (with latest IOS and updates). This particular import issue has only happened today, and yesterday the import was fine.
In Lightroom, change the sort order to capture time.
Yeah, I just got that a bit after I posted? But thank you very much!