This is a contiguous sector issue (kinda techy) but most images are already "split up", but the fragments are right next to each other geographically. The FAT (File Allocation Table) is what is used to keep track of where all the fragments are located.
You are technically correct however, but it is rarely an issue.
imaginationltd wrote:
If you delete images in the camera and continue taking photos, the files will be split up into smaller files and spread into the empty spaces. A single photo may then reside in several locations. If something goes wrong you may not be able to recover them.