This comment is actually referring to the change I made in this PR to give each list level its own CSS counter rather than sharing one counter for all list levels. Will improve this comment.

As to the issue you raised about it only supporting the top-level lists this is something that is quite vague in the spec. In LO it does seem to work for lists with levels > 1 quite reasonably as shown below.
![bugcompare](https://cloud.githubusercontent.com/assets/4240149/2967163/4e66d280-db28-11e3-9bdf-2edc209d9fd1.png)

I will update the PR to handle the above scenario as it appears to be logical behaviour for a continued list.