Don't listen to me

Boss: I know you have a schedule in which we gave you to follow but I need you to spend a few hours to work first on project x  and y first.

Me: Ok.

Boss: Yes so do those projects first because they are very urgent then follow your schedule.
(My schedule was already book until the next day)

Me: Ok.

Boss: But you shouldn't listen to what I just said follow your schedule first. Don't listen to me.

Me:...Ok....