Problem with Tournament invites...

You could tell that person to go here >>>
http://www.chess.com/home/echess_settings.html
And go down to
Unavailable
And tick the box of " STOP! I'm NOT available for challenges or tournaments!"
However, that does stop Online Chess (Turn-based) challenges.
I would say this is a bug, but see if she/he hasn't turned on the above.
I want to receive challenges but not tournament invites and its still not fixed even now
I HAVE my settings switched off
INVITES
Control which kinds of invites you want to allow/receive.
FRIENDS: allow others to send me a friend request
GAME CHALLENGES: allow others to challenge me to a game
JOIN GROUP: allow others to invite me to join a group
TOURNAMENTS: allow others to invite me to a tournament
But I want to still receive challenges
At our group we are organizing a tournament, I was named TD, so I started inviting members. Since we are getting new members everyday, I send invitations at least twice a day. The system supposedly eliminates those already invited and those that already joined along with those not accepting invites. Up until now no one has complained, but a member of the group started complaining today about receiving invitations twice a day, and that he/she is not even accepting invitations. But the system doesn't show her name among the sent invitations.
He/She keeps complaining about the situation and asking me to send invitations on a personal basis to new members only. But if the tool exists, why should I? The system is supposed to send an invitation just once and eliminate his/her name from further invitations.
Is this a bug? Or am I making assumptions about the system that haven't been implemented yet?