Are you tired of Hamilton yet?

Hope not, because I need some clarification.

He
http://www.velonews.com/news/fea/7242.0.html

Hamilton says the Olympic B sample was destroyed due to a negative A sample.
Is that truly the procedure? The B sample is to be frozen (destroyed) after
a negative A sample? Then he says that after two tests with negative
results a panel examined the results and decided they were positive. I want
to know who or what originally read the results as negative. Was it a
different panel, a computer program, or what?

Also, why would he be denied a sample of the blood in question? Shouldn't
he be allowed to have another party test the blood? What are the rules
governing this?

And finally, if freezing blood makes this test useless, why would blood
doping cyclists not simply use blood that was previously frozen, like blood
from a blood bank?