in repeater Automatick change start date End Date

Question

Hello,

i have three job entry,

1.BusyBee to start date 09/10/2017 to end date 10/10/2017

2.50mm to start date 11/10/2017 to end date 13/10/2017

3.Taj to start date 14/10/2017 to end date 18/10/2017

 

but if work are not completed in disided time like first work BusyBee start date 09/10/2017 to end date 10/10/2017 but work are completed 11/10/2017 then second entrry automatic generated in reapeator 12/10/2017 as a second job work how can do plz help me...