its happened several times with umdnj-njms. there are a few other threads on here where people have discussed it. it most likely means they're still interested in you. some people that had the second interview were accepted. in the past there were others who got waitlisted. i think its an issue with one or more of their interviewers, i know when i interviewed there, a couple people were complaining about how their interviewer hardly asked them anything and was somewhat unfamiliar with the entire process, whereas my interviewer was great and i felt like i was asked anything and everything possible. in general the interviews there are pretty long, 60mins or more, so they must put a lot of weight in that. good luck, as long as you address any specific concerns, i'm sure you'll be fine. when was your first interview at umdnj?
