Those are significant improvements. I think as you were previously told, you're lacking a minimum number of nonclinical volunteering hours which could continue to hinder your results.
In any event, I suspect they just didn't want to use one of their limited ED interview slots on someone that they have already met, and as you previously said you thought your interview there did not go well. They may give you another shot later this fall, or they might not. Regardless, the actionable takeaway from this should be that you really need to get more volunteering outside of a clinical setting.