A family of Microsoft word processing software products for creating web, email, and print documents.
If you are saying that you want 1, 1.1, 1.1.1 numbering or equivalent, note that at Level 2, you have to select Level 1 for "Include level number from," but at Level 3, you have to select both Level 1 and Level 2. Are you saying that the "Include level number from" dropdown is not showing Level 2?
Just in case you're trying to format numbering from the Modify Style dialog, be aware that this is no longer possible for multilevel (outline) numbering. You have to use the Define New Multilevel List dialog, and you should be able to set up all levels at once and link them to the appropriate styles. If you select one of the numbering styles that are already linked to the built-in heading styles, you save yourself a lot of work.