Padding issue in submenu

I have added a right padding to my menu items so that it will space them out on the menu bar. This is fine, except for my submenus, which is inheriting that trait. I have a color change on hover and the link state color is displaying under the hover color. I've tried adding the padding to the hover state, but it's not working.

How can I either get rid of the padding on the submenu, or add it to the hover state so the correct color will show all the way across the submenu?

Also, I am using the custom menu feature in Wordpress, instead of Atahualpa's menu feature, and so the drop down arrows have disappeared in the main menu, indicating which items have a drop down. Is there a way to get these arrows back?

URL is www.tmpranchrodeo.org.

I am using the most recent versions of both Atahualpa and Wordpress.

Thank you!