Social agro question

[Calamitous Oeuvre]

Quick question, I am a 35 BRD and I was helping a 35 MNK to bank in Kelethin tonight. MNK was sneaking behind the banker and didn't pull agro and never had to FD, however, when my invis song dropped I did pull agro. Is this a social agro problem? I'm scratching my head wondering what happened. I could understand if I jumped the agro list when he was spotted, but he never was. He never had to FD. Invis dropped and then I dropped.


Any ideas? Am I on the right track?