Astana sent a very weak team to the race. To support Contador in July, maybe only Popovych and Zubeldia would be picked but that's probably it, no?
At the very moment Rabobank hit the front, Columbia were chasing in anticipation of a sprint finish so Astana probably thought they could have a moment off duty as other teams were doing the work but they paid the price for this lack of vigilance. It was windy on Stage 2 and for Stage 3 they should have been alert to the risks.
If anything, yesterday revealed the weakness in Rabobank. They dynamited the peloton but didn't get the win, despite three out of seven riders in the lead. Worse, they let Chavanel win the stage, he took a 10 second bonus for the win. Garate should have been glued to his wheel.
But for the politics within the Astana team, I would not read too much into this, it was a big mistake but does not say too much about July. After all, the way he seems to be riding, Contador could be on Skill-Shimano and still be a favourite to win.