PhD Application Review moved from Fall 2015 Start to Spring 2016 Start: Options? I applied for PhD programs starting from the fall of 2015 at several universities and I was waiting very eager to hear from them, because I just finished my MS last spring semester and don't want to waste time. 

However, in the mid of this month, I received email from one school telling me that  the admissions committee has decided to move my application for review to the 2016 - Spring semester. In the letter, it didn't mention any acceptance/rejection. They moved my application for the next review which doesn't mean I have been accepted. 

I'm really wondering why and how did they decided to delay my application. Moreover, What would you advise in this situation? Can I ask them the chances of acceptance or the reason for the delay? Or should I just wait?
I think given the amount that I know from your post, I don't think we can give you more advice than to ask for clarification.  This isn't a standard procedure that I know of, though I could imagine various reasons this could happen.  Since I'm just imagining (and I'm sure you are too), just write a polite email to the director of the graduate program, or whichever faculty member seems to be the correct contact, and ask them precisely what this means for you.