New job – I’m confused

I think I messed up somewhere, I got a new job as an ALT back in June with the same visa status that started Sep 1st. My old job ended on July 30th. I was told by my previous employer and the city hall when I left the city that I didn't need to do anything (I went to request a moving out notice -which is another horror story) since my contract ended. Now I see that I needed to submit a Notice of withdrawal from the organization? Anyone have any experience with this? I did submit the Notice of transfer once I started my new job but I can't find any info on this.

by Professor-That