I do not see where you extended out of the extension zone. In the competition I went to yesterday with my team we saw many robots go out of the zone and some even out of the arena. The only way you could get disqualified for that match would be if you pushed a disk from the 3 point zone into the 4point zone. Even then I don't think you "should have been disqualified". The judges at my place would probably just move the disk back and pretended like it never happened. Hood job tho on that run!