Haha don't worry about it! It's all good.
It happens fairly regularly when the voting becomes split over two pages. When people log in for the first time in a while, they don't necessarily land on the last page in the thread, and then it's easy to copy and paste from the last message on that page without realising there's another page.
Don't let Will's brusque nature put you off.
I liked your photo - were you using a long exposure to create those light trails?