Paul does list games under alternate names under the alphabetical listings (like Akumajo Dracula X and Dracula X - Chi No Rondo), but the total number of games is consequently well over 738. lkermel also sometimes lists stuff twice (Ginga Fukei Densetsu Sapphire and just plain Sapphire), but his listing is of his reviews not every game ever made.
In both cases, the double listings are to make games easier to find. Nuttin' wrong with that.