I don't know what "dismissed" means in this context. But what I see is that you pled guilty, paid a fine, and went to traffic school. That's "convicted" no matter how you spin it and I find it hard to believe that the conviction wouldn't be easily accessible to your employer, your insurance company and the DMV. Don't rely on the docket entries as they often don't tell the whole story of what appears in the case file. I suggest you visit the courthouse, read your case file and see what the actual documents say.