[CLOSED] DataGridView column resizing - what should it be doing?

I have a simple DataGridView bound to a list which contains a DateTime column. When the grid displays the DateTime column is only resizing to the first space character in the date and time and wrapping the remainder of the text to the next line. setting the column autosize options does not appear to have any effect.

Is this the correct behaviour? I was expecting the column to resize to fit the whole of the date and time on one line.