I have seen this issue quite a bit, both with the 1900 census and also with 1920. The pattern that I have seen is that a township and county are placed in the wrong state, such as Buffalo Township, Ogle County, Illinois moving to Georgia. I just saw it also happen with Hall County, Nebraska going to the wrong state.
If you can find the census on FamilySearch (e.g., via the FamilySearchFamilyTree or via the hints provided for other records), you can select edit for the location field then highlight the portion of the image that was indexed incorrectly.