9/11 Inconsistencies

There are a lot of theories about problems with the official story of what happened to the United States on September 11th 2001. I don't pretend to know what happened. I do know that there are inconsistencies in the offiical story we were fed by the White House and the main stream media. Two big problems for me are the fact that steel and concrete buildings poured down out of the sky like water falling with little or no resistance.
The other problem is the offical list of 9/11 hijackers. http://www.fbi.gov/pressrel/pressrel01/092701hjpic.htm This is a link to the official FBI list of hijackers.
None of these names appear on any of the flight manifests, look for yourself.
http://911research.wtc7.net/planes/evidence/passengers.html And then there's this list.
http://www.indymedia.be/news/2004/05/84711.php
I called the FBI in San Francisco and asked why this was so. They were mum.
So how did the hijackers board the planes without tickets or boarding passes. Did they muscle their way on to the planes? No one reported anything like that. We were told they took over the planes after they were in the air. This inconsistency would seem obvious.
As far a steel and concrete turning to water or a non solid and falling at almost the speed of gravity, see this.
http://911research.wtc7.net/essays/nist/
It should also be noted that the 9/11 commission, formed to investigate the largest crime scene in U.S. history, was not even formed until 441 days after the crime.
I'm not saying that planes didn't crash into some buildings and I'm not saying that our government intentionally allowed this to happen. I am just trying to figure out what did happen based on these inconsistencies. What say you?