The Roll number has been removed from at least some of the 1860, 1870 census entries. The "Source Citation" listed under the extracted entry is no longer there. Under "Source Information" the NARA microfilm publication number is listed but that alone is not proper source identification. Proper documentation requires a roll number be indicated as well.
e.g. Uriah Spragg in 1860 Burlington county New Jersey
e.g. Uriah Spragg in 1870 Cumberland county New Jersey