Trouble adding multiple, lettered multilevel lists to Word doc.

[kneves]

I am writing a lengthy document divided into three sections: A, B, and C. I need each paragraph in each section to be numbered according to the following multilevel list style:

A.1.
A.1.1.
A.1.1.1.
A.1.1.1.1.
A.1.1.1.1.1.
A.1.1.1.1.1.1.
A.1.1.1.1.1.1.1.
A.1.1.1.1.1.1.1.1
A.1.1.1.1.1.1.1.1.1

and

B.1.
B.1.1.
B.1.1.1.
B.1.1.1.1.
B.1.1.1.1.1.
B.1.1.1.1.1.1.
B.1.1.1.1.1.1.1.


B.1.1.1.1.1.1.1.1
B.1.1.1.1.1.1.1.1.1

and

C.1.
C.1.1.
C.1.1.1.
C.1.1.1.1.
C.1.1.1.1.1.
C.1.1.1.1.1.1.
C.1.1.1.1.1.1.1.
C.1.1.1.1.1.1.1.1
C.1.1.1.1.1.1.1.1.1

I have tried to define a new multilevel list for each section as well create new heading styles for each paragraph under each section. This works initially; however when I begin working in the section and adding new paragraph headings, the numbering is incorrect. For instance, if I added heading style 2 under A.6, it would come in automatically with A.1.1. rather than A.6.1.

Any ideas?