Sbiddle - I tried changing to select separately, but when I go to select the second seat it puts it next to the first seat selected. It will let me select seats in different rows, but not window and aisle on the same row, so it's obviously a deliberate feature of the software.

NZButterfly - since you are familiar with the seats at the back - do you think the person in the aisle seat would risk getting bumped into?