To answer your question directly, no I do not know of any DV based AOS petition thats already had an interview and did not get approved by the Sept 30th deadline. Not saying it has never or may never happen, I just haven't seen, read, or heard of such. I've read if cases that didn't get scheduled for an interview by Sept 30th, and those cases for denied when they eventually got called up on around October (following the end of their applicable FY).
What you need to do, since you've already been interviewed is to keep following up with your FO.