Ask HN: Help section & duplicate comments

I can't find a 'help' section outside of the guidelines & FAQ so please let me know if there is one and I'll head over there.

My problem is that my comments are appearing in duplicate, so I have to remove the 2nd one if I get there on time. I'm not clicking on submit twice but I may leave the page & come back to finish the comment.

If anyone know what might be happening, I'd appreciate the help.

Thanks