Oh law firm에 나온 내용입니다.

During the past year, many preference categories have experienced steady and sometimes rapid cut-off date movement. Such action is normally followed by an increase in applicant demand. Heavy applicant demand for numbers in some categories could require cut-off date movements to slow, stop, or even retrogress at some point during the remainder of FY-2009, in order to hold visa use within the applicable annual numerical limits. Should such action occur, it would most likely be only temporary in nature, pending the start of the new fiscal year in October. Ouch!

리밋이 다 차간다는 것이 이유랍니다. 쩝.