Sublevel of numbering not indenting

I am trying to do multiple levels of numbering like this:

1. title
    a. sub title
    b. sub title
        i. sub-sub title
        ii. sub-sub title

I can get the paragraphs to indent to the next numbering level, but the actual numbering itself doesn’t indent, and it is like this right now:

1. title
a.     sub title
b.     sub title
i.          sub-sub title
ii.         sub-sub title

What should I do to make the numbering itself indent?

It seems to me that you need to adjust the Position tab of the Style you use.

This is what I created:
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using the following Style settings

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and

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and

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I also recommend to have a look at the free guides which you can download from http://www.libreoffice.org/get-help/documentation/