Why are uploaded photos not in accurate date order taken on timeline?

[sailorgal4]

I am trying to confirm photos are actually ALL uploaded to Verizon Cloud when I sync.  Why aren't photos in date taken order?  Cannot tell if they are all uploading or not.  Nothing seems to be in settings to allow reorder of lists.  Grid or List only.  Why do I care when they were uploaded? Just need to know they are all there--too hard to tell this way.