By default lists have their own hidden indent for the numbers or bullets, which is not displayed in the editor ruler. To use your own indent you must apply a style or format the paragraph manually.
List definitions only define the bullet or numbering styles to be used and a standard automatic indent between the number or bullet and the list item. They do not allow you to format indents or to define paragraph formatting, and they are not linked to paragraph styles. It's also important to know that the list formatting templates really are templates, not dynamic styles.
Paragraph formatting and indents can be applied manually or with styles. In addition to this you can also change the appearance of the bullets and numbers (color, bold, italic etc) by applying manual formatting in the list items.