If I try to recreate the issue manually by running the back up, it works fine meaning it doesnt backup files that have already been copied but this is after it has backed up everything on Sunday. What is triggering it to backup everything just on Sundays?

CloudBerry Backup Ultimate Edition
Version: 7.0.4.3
Backup Mode: Custom - storage class is Glacier
- backup all files
- does not back up system and hidden files and on-demand files
Retention policy: keep 3 versions
Recurring Schedule: Daily Incremental Backup