So you got an offer in October to start the following January? Do you still have the offer letter? That would help to show that the offer was already in place and you weren't simply waiting until GC approval to change jobs right away. The fact that it was in a different state also shows the job change wasn't an overnight thing that suddenly occurred because of GC approval. And the job change was after the I-485 had been pending for 180 days so you qualified for AC21 protection if the new job change was "same or similar".