The CSS propertly, 'float:left', is added by default to our ad zones, since many publishers wish to have their ads floated in a zone. If you do not want your ads to have the 'float:left;' property, there is an option on your "Install Ad Code Page" called "Vertical" that will display your ads vertically and not float the ads. If you check this option, it will remove the "float:left" property from the "Anchor Style" field and keep it removed.
If you are still having issues getting your ads to display the way you want them to, please open a support ticket so we can assist you.
We tend to answer most support tickets during normal business hours: Monday to Friday, 9:00 am to 6:00 pm (EST). However, we're constantly monitoring tickets, and we'll address urgent issues on nights and weekends, too.Open a Ticket