Why Does the Windows Photos App Sort My Pictures Wrong?
The Photos app sorts by the date inside each picture. When that is missing it uses the file date, and the order collapses.
The Photos app sorts by the date inside each picture. When a picture has none, it falls back on the file's date, which is when the file arrived on your PC. Mix the two and the order looks random.
You will often see it as one huge block of photos all on the same day, usually the day you copied them over, with a few correctly dated ones scattered about.
Fixing the dates inside the files fixes the app, with no settings to change. Takeout JSON Metadata Fixer writes the real date into every picture, then Photos sorts correctly on its own. It runs on your own computer and is free for your first 500 photos.