goodsmvmt

Hi

i created 2 orders on same day ,then i went to Cm03 ,there i got ooverload ,after that i went to cm21 ,theer i have dispatched the operation from order pool to workcenetr ,i observed in the Co02 that start date and finish date hasbeen chnaged ,but in the system status GMPS(goodsmovement posted) is theer ,after dispcth operation gmps will it be done ,but i want after confirmation only GMPS should be done

can anybody help that ,why GMPS happend after dispacthed the opration