The man told RNZ he hadn't attended the meetings, but admitted being in the room.
"I didn't attend them. I was there to support my partner in the room. I didn't attend any of the meetings per se," he said.
When asked if it was appropriate for him to have contact with survivors during informal gatherings, he declined to comment.
The man said he talked to some of the survivors at those gatherings, but his contact was limited and he did not join them for meals.
"I was not sitting with them. Me and my partner were sitting at a table away from them."
He told the commission two weeks ago about his sex offences, but they were told months earlier that he had to notify the police when he travelled, though they never asked him why, he said.
A meeting of the survivors' advisory group in Christchurch today was cancelled by the Commission.
Panel member Tyrone Marks said they were told it wasn't going ahead because some of them had spoken to the media about sex offender and this had retraumatised some of the group's members.
He was angry the meeting wasn't going head because the group had not had a proper chance to get down to work yet.
"We're supposed to be the experts.... to me, it's just an excuse and it's kind of like a punishment thing because we've done that [spoken to the media]. So everyone's not happy about it."
The entire Commission needed to be replaced so survivors could have trust in the inquiry, he said.
- RNZ