In the case of Ganguly, I think the intense pressure just got to him. He probably knows that his days in the team and as captain are numbered for many reasons possibly even beyond his performance. So he proably thought that with a century behind him he could build up some support!
The commission scheduled to meet later this month includes Gavaskar, Shastri, Venkataraghavan, Chappell and R. S Mahendra (the Board President). While Mahendra has past scores to settle, Chappell has his reputation at stake and will do whatever it takes to build Team India. The others are tough task masters and will feel the onus of setting the direction for the Indian team for the years to come. In short, it a pseudo selection committee where the stakes are high. Its good to know that Chappell is trying to clean house and I hope he succeeds. I still think Ganguly is a good captain, but it appears as though the standards set by Chappell are a little too much for him. If this is true he must go.