Do any of us understand the process for the democrats?

I keep hearing all kinds of excuses for Hillary not being in the lead, and I have to ask one thing, was it agreed upon by both Hillary and Obama that the one who had the most delegate ay the end would be the nominee, all the rules were set long before we got to this point so why is Hillary now trying to change the rules, could it be she is loosing and despartly feels she is entitled to the office because she slept at the Holiday Inn.