Each section within an InDesign document can be numbered differently. This allows you to use one type of numerals to consecutively number a document's preface or other introductory materials and another numeral system for the remainder of the document. You must first define your document's sections, and then you can add section markers or page markers to your master pages. Apply the master page to document pages to include the section and page numbers on the document pages.

I have set up a multi-level list but when I insert a lower level list within a higher level list (ie. 1,2,3,then a,b,c) the higher level list does not continue as expected after the lower level list (in this case “4” is what I would want) but rather continues as if the lower level list were part of the higher level list (in this case “7”). Does anyone know how to fix this?

If you know in advance that you need outline numbering for your paragraphs, you will want to choose the correct format from the Bullets and Numbering dialog box. Applying one of the preset formats to a paragraph or paragraphs that are already bulleted or numbered applies it to the entire list. There is a specific tab for outline numbers — the Outlined Numbered tab.
The heading here could be anything: affirmative defenses in an answer, articles in a contract, etc. It doesn’t matter; the technique is the same with only slight variations. The result is that you’ll have a heading saved in your Quick Parts that will be numbered correctly, no matter how many items you add or delete. This makes this technique particularly useful in building templates for common documents; because it’s always easier to delete than add, they’ll re-number themselves after editing.
A CorelDRAW Graphics Suite expert, Roger has been a popular presenter at industry trade shows. He has developed and conducted classroom training and online sessions throughout North America and has authored articles for key industry magazines, including SQE Professional and The Screen Printers Resource Guide, and is a regular contributor to Trophex magazine. You can train with Roger using his book, Bring It Home with CorelDRAW: A Guide to In-House Graphic Design, or by watching his online course, CorelDRAW Essential Training.
In the Adobe InDesign document I’m working on here we actually have two master pages, an ‘A’ master and a ‘B’ master so I’m going to select both the left and right hand page frames with the special character in on my ‘A’ master and go to Edit>Copy. I’m then going to double click on my ‘B’ master page and go to Edit>Paste in place. this will then copy the special character and position it in exactly the same place as it appears on my ‘A’ master. numbering in publisher