Problems emerged almost as soon as data became available. An Associated Press review of the initial set of numbers, in October, found that the first count of some 30,000 jobs directly created by the stimulus was off by at least 5,000.
The administration responded to that report by promising that the full data would "provide the American people with an accurate, detailed look at the early success of the Recovery Act."
But the more complete data set is riddled with errors. Job creation is claimed in more than 400 congressional districts that simply do not exist, some of whose existence -- the 99th congressional district in the U.S. territory of the Northern Mariana Islands, for instance -- is preposterous.
Scattered reports of more significant data errors nationwide have forced the administration to, in some instances, scale back job creation estimates.
For example, Talladega County in Alabama claimed that 5,000 jobs had been saved or created from only $42,000 in stimulus funds. That figure was adjusted downward by the Office of Management and Budget, part of 60,000 jobs subtracted from official estimates.
"We are continuing to examine data for inconsistencies or errors, whether small or large," Rob Nabors, an OMB deputy director, told ABC. "Given the unprecedented nature of this reporting effort, these are cautious, responsible steps to ensure that the information provided to the American people is accurate and reliable."
ABC News' Jonathan Karl, Zach Wolf and Matthew Jaffe contributed to this report.