Incorrect calculations for column width

I've just tried this module for the first time on a new site we're developing and I've come across a mistake in the maths for calculating column widths in the following 2 lines -

  $column_height = max($min_height, ceil(count($element['#options']) / $element['#multicolumn']['width']));
  $column_width = ceil(count($element['#options']) / $column_height);

In our setup we've got 24 values that I want arranged in 7 columns (they correspond to days of the week). The first line rounds up 24/7 from 3.428... to 4. The second line then calculates the column width as 24 / 4, which is 6! Thus there's no way to get 7 columns. Surely this needs to not round up $column_height if greater than minimum, at least for calculating $colum_width.

If we do use this module, I'll try and provide a patch for this. Haven't had time to see how this variable gets used elsewhere yet.