It's difficult to answer without a screenshot showing the problem.
It sounds like you are using a numbered list followed by a bulleted list rather than a multilevel list. The latter can be set up to have numbers at the top level and bullets at the second level.
Editing the styles, whichever method you use, has some controls in the style editor but some of the finer adjustments need to be done at code level. I am hoping for an improvement there in an update.
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