hmmm... am i not reading this correctly? she seems to disagree with you? and it meshes with the info i found and posted earlier about being removed:
How long will a drunk driving charge stay on my record?
Lacy Fields, Attorney at Law, LLC | Lacy Fields
It stays on your "record" forever, or until you get it expunged. You can only expunge it if you have not received additional DWIs/alcohol related traffic incidents. However, if it was your first offense and you received "SIS" probation,
the "record" will disappear from Casenet and other public forums once you have successfully completed probation. Moreover, SIS does not count as a "conviction" in Missouri, so you can truthfully say you were not convicted of that particular crime (eg. on employment applications).
Answer Applies to: Missouri
Replied: 4/14/2011
http://www.lawqa.com/qa/how-long-will-drunk-driving-charge-stay-on-my-record2
(page 4)