When looking through the list of Incidents on the ATP and SEDR Manager web interface, there appear to be gaps in the incident ID numbers. It appears information may be lost or there is an issue with the software. You may also see numbers get duplicated after a year or more.
ATP/SEDR allocate Incident IDs in groups of 10, assigning them sequentially. If the appliance is rebooted, the software will allocate the next groups of 10 incident IDs and begin at 0 in the new set.
For example, if it has allocated Incident IDs 100040-100049 and has only assigned up to Incident ID 100043, after a reboot it will allocate 100050-100059 and the next incident will be assigned ID 100050 as incidents occur and then move on to the next batch 100060-100069 and so on.
This is by design and does not indicate a problem with Incident reporting.