This person's 排期 was current before and then, after she filed I-485, the 排期 turned back to several years. This is very common. For example, all the employment based 排期 including Eb1, Eb2 and EB3 were current in July 2007 and many people filed their I-485 at that time, but the 排期 turned back after that and many of people have not get their GC yet by today.