The attribute values of a shapefile created by importing a MIF file are in the wrong fields. Everything is shifted to the right.
The tabular data stored in the MID file contains a field with the same name as the default field ArcView attempts to create. For example, if you have a MIF file named mapdata.mif and you import that data to a shapefile named mapdata.shp, ArcView will create a default field called mapdata_id. The problem occurs when the MID already contains a filed named mapdata_id.