Why was my credit removed?

Hi, I was wondering why my credit for "Perpetual Grace, Ltd." was suddenly removed since I listed it around January. I was indeed a "Half-Way House Resident" on the episode entitled "Almost First Mexican on the Moon, Part 1" (a quite cold filming day up in Las Vegas, NM, incidentally). If you'd like to list me as 'uncredited' that's one thing, but it feels unfair considering the work I put in. Thanks, Stephen Conn