I just tested your site and the update seams to be functioning as expected.
I updated the CSV on the update link you provided and the changes where displayed on the main page.
HTML editor does not support using pixels for the font sizes.
To use your own style sheet, edit the HTML editor instance.
On the Style tab, click the Folder icon next to Editor CSS
from the list of Available styles, you will need to select each stlye that you wish to offer in the style list.