Back-dated versus out-of-sequence job

Not all out of sequence changes are back-dated, and not all back-dated changes are out-of-sequence. These are really two separate issues, which in some cases may both be true, but neither one necessitates the other.

Compare these two definitions:

• A job is back-dated if the change has an effective date earlier than today.
• A job is out-of-sequence if the change’s effective date is earlier than the effective date of another job in that contractual period.