I'm checking recent alternates I made, from the "Thank you for Contributing" email I received on 4 Mar 2013.
An alternate made in the 1850 US Census resulted in the same as I posted above.
An alternate submitted to an unrelated member of the household, resulted in all other members receiving the black "alternate to nowhere".
The "reason" for the alternate is not included. I'm concluding if you write in the field, that data cancels the selected "reason".