Sounds like it was a bummer of a day. When you have your mind wrapped around a tri and it turns to a du- that can mess you up mentally and make for a rotten day (and flats, bad crowd control, messy organization, etc makes it just awful).
I'm really proud that both of you actually did it, tho, despite the tough time you had.
Congrats on your finishes. Now, on to the next one...