This is as designed, (though the design may not be the best if it is not user friendly)  If you notice, it says if checked, do not complete designee information immediately after the checkbox.  

I believe this is due to the way the new postcard works, in that if the designee is the preparer, the schedule 6 is not completed and a checkbox is marked on the postcard instead.  It was likely cleaner to program it to complete schedule 6 if information is on part V, and don't complete schedule 6 if  part V is blank.  

As long as your information in the options is correct, then the information transmitted as the designee will also be correct.