After import, you have options to show the photos sorted in various ways - whatever order they happen to have been imported in, you don't have to see that - unless that is what you particularly want. For example, by capture time / edit time (when you last worked on each image) / colour label etc.
The only two cases where it may even matter in what order the photos were actually imported, are: when viewing a given folder- or collection-based view, with "added order" chosen as the sort sequence - rather than "capture order". Or: if as part of your import you are renaming the images and including an incrementing sequence number in that - then you may want to be sure it's chronological.
For those two cases, you might want to make sure "capture time" is chosen as the sorting option at the bottom of the import screen, when bringing new photos into the Catalog.