Vs. means the player is hosting the game. @ means the opponent is hosting the game.
Thank you for bringing this up! I totally forgot about the illegal characters!
Chess.com does not allow . , : ; @ # etc. on game set-up.
Take out the ACL:. Just make sure you have JJJ vs EEE. (That was an example.)
@Peregrine_Appleclock, @Emmalee_Applematch1, @Nola_Applequill1, @Matt_Bonnetfolly1, @Molly_Cartdust1, @Draven_Eldercraft, @Jacoby_Elderfun1, @Pig_Larkcape1... (MORE MENTIONS I NEXT POST)
In referral to this: