to above
thank u, but i think it might be something else. in that flight, my captain was PF, i am PNF, so basiclly PF orperated and modified his MCDU and then the info in his mcdu will be transferred to my fmgc then mcdu automatically, i just did "confirmed" part, which made sure that the info in both mcdus were exactly the same, however the result,by result i mean distance was different, that's why it confused me and my captain...