Once the operation is Milestone confirmation operation and it is getting cofirmed, then all the preceding operation up to untill the previous milestone operation gets confirmed automatically.
What is Milestone Confirmation?
Updated May 18, 2018
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Milestone confirmation is a special form of confirmation,in which the confirmation of one operation causes other operations or sub operations to be automatically confirmed at the same time.
Milestones are the operations that have the corresponding indicator in the control key. Operations can be defined as Milestone operations in their control keys.If a milestone operation is confirmed,then previous operations are automatically confirmed.