Board Thread:Support Requests - Designing Your Wikia/@comment-18116984-20151103172900/@comment-4018164-20151103173720

Due to the comma, the  "sub-selector" will select any first td child, since there is no   before it. So try: (i've added spaces to make it a bit clearer)

There are ways to make a single selector with a changing part, though its browser support is too poor to even discuss.