Actuals given,activiy %=100 but there are few remaining units in resources shown

Hi,

In an already existing program, I tried to give a finish date for an activity.

However, it takes start date as finish date.

Upon completely moving out the start date & finish date & then trying to re-enter both of them, it accepts and shows activity %=100

HOwever,in the resources, there seem to be remaining units still left out instead of zero.

Kindly advise.

Thanks