Hi Lee,

the way I interpreted what he was saying was that the floor thought, based on the number of sell orders, that there was another 30 cents more to the downside. To me that would mean they would expect it to be limit into the close, and then down another 30 cents on tonights trade.
Myself I think, if it came off the limit during the day session then that may washout their theory of another 30 cents to the downside.

I don't know how the exchange goes about adjusting the limits that a commodity can move. I don't know if its automated, or they just decide at some point that there is a need for it and then do it. It seems more like the later, but I don't know.