I Think if she did release 4 singles it wouldn't gone like this:
A Thousand Miles [well we all know that was huge]
Unsung [because it's catchy and different from 1000 Miles, rather then Ordinary Day, which i dont think was a very good choice for a single]
Rinse [Darker and again different from the other 2, just to show V can perform with different styles]
And lastly
Ordinary Day [ just so the old Vanessa that everyone fell in love with shines through, just to think that Unsung hit big, this song would be really good as a finisher.]