Lance got beat plain and simple - run thru the line; only has himself to blame.
I think he was pissed he got beat; probably half at himself and half at Jordan Jones.
I really wish I knew what he mutters under his breath right after the line - probably something like "Way to go jackhole!"
Even though it was for 6th in the race, it was also for 2nd as this was a USA Championship event.
As far as ignoring his daughter; he didn't really.
He was struggling on the run, just got pipped and was pissed on a hot day. Noone really sees or hears anything at that point, he probably just wanted to get in the tent. I'm sure all was smoothed over with them.