The DUI through civilian court and the GOMOR and flag for the DUI are two separate actions.
My first question would be, why were the charges dismissed?
Second, the flag is required for the DUI in civilian court and the GOMOR from the military side. Since the charges were dropped from the civilian court, you are no longer flagged for that action. However, you are still flagged for the pending GOMOR. This will remain in effect until the issuing commander directs what happens to the GOMOR (filed in OMPF, locally, or destroyed). Once that determination is made, then that flag must be lifted. However, you could still be barred from reenlistment for the DUI even though you were not convicted in civilian court.