Looks like the Emulation category is rarely visited in the message board section; it was just luck that I happened to visit it at this time. To answer your question: playing Atari 2600 carts on an Atari 7800 console is NOT emulation. You can submit those scores in the Atari 2600 hardware category.
You can also submit Atari 2600 scores in the hardware category if you're playing on the Gemini and the Colecovision (expansion module that enables you to play 2600 carts on it).
@DuggerVideoGames: I have a doubt, I have a "china" console of the Nintendo version, my question is: is it considered in the emulator category? Although it has the original cartridges of Famicom and Nes
Already a few days ago I saw a player playing games of Play Sation 1, in the console PS2, and had many negative votes .... my question is: how in Atari 7800 is it worth playing cartridges of Atari 2600? .... and Is not valid Play PS1 games on the PS2 console ????