That's odd. I definitely remember that they stopped airing season three at 6:30AM after Aster's duel since I was looking forward to seeing Zane's duel with Yubel. GX was taken off of the schedule after that two-parter. I know that season three started on Toonami and then they put it at the end of a Saturday morning block before they stopped airing the series. I also remember that they had GX back on the schedule for about two or three weeks, not over a month. Of course, I could be wrong and I wouldn't be too surprised if that was the case.