2000 accent trans problem?hey hyundi help!!

hello again im the one with the problem with no reverse and .you were right did have low trans fluid.i went to auto zone asked the front sale clerk and looked up what trans fluid to use he told to use brand name coastal universal synthetic blend.dexron III(H)& MERCON V.the back of the trans fluid bottle says for hyundai,the regular tran fluid that we used before is atf sp-11 m genuine diamond atf sp-11 m.when we had the pan dropped and cleaned trans filter they only added 4 quarts and the car manual it says it is supposed to have 7.08 us qts.(5.9 imp. qts.6.7 liter)the pan was done about a 3 months ago.just wanted to make sure that the fluid we added was correct and should they have added more then 4 quarts when they had serviced our car.thank you