As I pointed out in a post last month, a fair number of comments are tagged as Trash by the anti-spam filter, which we have no control over. We get up to hundreds of spam/trash comments per day, and unfortunately some legit comments get trapped. We check the Trash file regularly and will retrieve your comment, sooner or later. Leaving duplicate comments just makes our job more difficult, because then we have to check if one of them made it through, or was already retrieved.
Thanks for you patience.