Bulleted lists in DITA should convert to their RTF equivalents without a problem, except in the following circumstance:
When a Word style has a name that starts with “bullet ”, Word 97 helpfully supplies a bullet as a prefix; the result is two bullets in front of each item. The problem does not occur in later versions of Word, and does not affect format names such as Bulleted.
If the RTF files you produce will be viewed in Word 97, you can rename the problem formats in the configuration file. For example:
[Styles] Bullet Open=Bull Open Bullet Sq=Bull Sq Bullet Sq Indent=Bull Sq Indent