I am not sure I quite understand the point of your post. It seems like what you are saying is that doing this is hard but the module does the best job it can. I agree completely but if I am missing something else, please point it out.
In this case, it turns out that the Kodak Z812 is writing invalid entries that appear to be place holders. Phil Harvey, the module author, is looking into this further but has suggested that a better solution than deleting the 'Make' tag is to use the 'IgnoreMinorErrors' option. This worked and no tags needed to be deleted.