Anything to the contrary in this chapter notwithstanding, the annual salary of every supernumerary official serving under this chapter on October 1, 1994, shall be increased by five thousand dollars ($5,000). Notwithstanding the foregoing, the percentages provided in Section 40-6-3, as amended by Acts 1994, No. 94-592, for computing supernumerary compensation, shall not apply to any supernumerary official appointed on or before April 22, 1994.