Why would you receive a March interview now?

I know the answer seems simple, but I’d like to dig down a bit more. OOS, Secondary submitted in July. High GPA, MCAT 1 pt below a schools Avg, strong ECs. Question: If a school has interviewed hundreds of stronger apps, and has many people to pull from WLs, why would they invite people now to interview in mid March? What does that say about these candidates? Are their chances quite slim since their names were not drawn in the past 6 months? Is it likely they are fill ins for... Why would you receive a March interview now?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Pre-Medical - MD Source Type: forums