This was a once-a-decade fudge factor.
Monthly corrections happen, well, monthly. So yes, the January numbers will be revised next month, just as December’s were this month.
Reality Check: Multiple Experts find the official unemployment rate is missing a whole lot of unemployed people --
http://biggovernment.com/waysandmeans/2012/02/08/reality-check-multiple-experts-find-the-official-unemployment-rate-is-missing-a-whole-lot-of-unemployed-people/