An extra 2,000,000 in chips at the WSOP

With 8773 paid entrants, this years WSOP Main Event was the biggest ever. Each player started with $10,000 in tournament chips, so there should have been 87,730,000 chips in play.
But both www.pokerwire.com and www.cardplayer lists the final table chip count at 90,140,000.

Where did these extra chips come from?
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Richard Brodie writes on his Quiet Lion blog (http://www.brodietech.com/liontales/blog.htm) . Omissions from his text are indicated by [...], Editors Note:[bracketed comments of this type are comments or additions by Dennis]

"[...] I shouldn't be surprised by the degree to which many in the poker community consider the 2.2 million extra chips found at the WSOP main event "business as usual." Cheating has been around since before poker [...]. There's the possibility the chips were added through incompetence rather than dishonesty, and there's still a tiny chance the reports of the final chip total are simply wrong. I wasn't there."

[The following] questions [...] ought to be asked by the Nevada Gaming Control Board: • Harrah's [used the] same chips in the main event as they used in previous tournaments [...].

Were the chips counted at the conclusion of each event? If not, why not?
If so, how many chips were missing after each event?
If they did discover missing chips, was there any effort to use the video surveillance to catch the [presumed] cheaters?
Were there official chip counts done at any point in the main event? If not, why not? If so, what was the result?
What was the discrepancy between each official count [if any]?
Were the same precautions taken to guard and log the movements of the house bank of tournament chip as are taken with casino chips of similar value? If not, why not?
How many dead stacks were blinded off through errors during day one?
What is the list of names of people who were allowed to play on a different day but had stacks being blinded off on another day?
Why were so many errors possible?
Were there stacks being blinded off for players who had been given refunds? If so, why?

The current explanation by a Harrah's spokesman, that the extra chips were a result of rounding up during chip races, has been proved impossible both by me and by Jerrod Ankenman, co-author (with two-bracelet winner Bill Chen) of the forthcoming book The Mathematics of Poker."
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So was it an honest mistake...somehow...but bordering on the incompetent? Did Harrah's pocket 200 extra entries? Systematic cheating? If I was an player who entered (and god willing I will be next year) I would definitely consider legal options. Certainly this has all the marks of a class action suit.
With next year's field projected at over 10,000, this could be deja vu all over again.