there is no way for this in a default setting.
I think because it's technical very difficult. Within a list you want
to continue the numbering. After having a little sub numbering, you
want the top numbering again continued.
1. good idea
2. bad idea, because
   a. it's not mine
   b. it's silly
3. best idea of all

After a while you will start a new list numbering. you expect this to
start at 1. Isn't it?

This weekend i will do some tests about this.
Maybe you can take a look at the following:
The best way of using list numbering is define a style (you did), edit
this style and choose a one of the existing number format from the
galery. You may change the format, but the one you have chosen must be
almost the perfect one.

rothrock42@yahoo.com schreef: