If you skip a status, the patient will not receive the notification (email / push notification) related to that status.
For example - Skipping the Dispensing Status
An order is in Prescription Issued on the Processing Screen and you have compared with the PMR
You change the order status from Prescription Issued to Completed (rather than Dispensing)
The patient will not receive the email / push notification to let them know you are preparing their order
They will receive a notification asking them to come and collect their order or that you will be delivering their order however dependant on their choice for collection or delivery and if you are offering delivery.