yes, well that is why the main engine took out the second stage. Splat, LOC, end of flight. You can see it clearly on that video. and it was clearly a re ignition.
I know what you're seeing, but how can you say it was "clearly" a reignition? Engine plumes aren't always easily visible, especially on a tumbling solid. The thrust at the tail end of a solid's burn can be a tad erratic. I don't think the booster reignited; I think it just hadn't finished burning out yet, which should be expected and means they cannot consider this an unusual event; it will need to be considered when designing the final, production Ares 1 rocket.
To me, the first stage's burnout didn't look particularly unusual. You see exactly the same thing during Shuttle SRB sep. As docm put it, "With solids MECO is an event without clear boundaries."
I don't see much unusual in the tailoff of the 1st stage...very typical of SRB tailoff on a shuttle flight. I have been looking on the YouTube video taken from a downrange aircraft (check NASAWatch.com for the link), and I just don't see any real contact on separation.
As to the parachute issue: There is no question that one chute failed immediately on deployment. Looks to me like the risers either broke or perhaps the main deck fitting released on one side of the chute (shades of STS-4???). The other two chutes seemed to deploy properly, but the dang thing went into clouds, and I can't get a clear picture at the moment the second and third chute fully deployed, but in the reefed condition. Something
then went haywire with the second chute. It looks like either a blown panel or, again, some failure of the risers on one side. But I can't get a clear view of it. It might have been something dealing with the reefing line cutter. But since the second chute appears to have disreefed, albeit with one side out, it could be something else. The other thing that is interesting is that that second chute almost looks like it got a riser line over
the top of the canopy. I can't tell if the chutes use one reefing line or two (like the shuttle SRB's). Looks like only one to me. It would be nice if we got some better information coming from Pioneer Aerospace and/or NASA.