What is Case ID and how does it relate to Case Number on Cases?

What is Case ID and how does it relate to Case Number on Cases?

During the initial days of CRM, this is how Zoho implemented. Technically, Zoho did generate 2 running id's during run time, one will be the Record id and the other as Case id. Zoho purposefully made a difference as 1 or 2 (2 in your case) to make sure that Zoho didn't expose the Record ID upfront. Zoho had a plan to completely shorten the case id to more 4 digits but that didn't happen.

If this is causing an issue a case can be raised.