Listview hasunevenrows not setting correct height

Hi, have an app I'm developing (WP8 and Android currently) with a ListView containing an ItemTemplate of a ViewCell.

The ViewCell has 4 'columns' (Horizontal stackpanel), column 2 has 2 'rows' (vertical stackpanel) and this one is causing issues.

The last row is sometimes wrapped on a word boundary and sometimes the rowheight is correct, other times it's not expanding to fill the second word (if the first word is short.

So

ANDREW
SMITHERS

would be correct but

TIM
ANDERSON

would set the row height to only show TIM

I'd rather not be setting the rowheight myself, any tips?

Thanks