I entered rountrip TAC-PDX on 5Nov and 6Nov. Also, I've entered H515 in promotion code. It came up with 25% discount (http://www.travelportland.com/big_deal/amtrak.html#terms). It's very odd that it applies discount on return trip only. After entering one-way (TAC-PDX and PDX-TAC), they gave us discount prices. Wondering if there's bug on reservation page?