DVD order Vs Aired Order

I save and scrape my TV folders on DVD order. Occasionally I have the show in Aired Order.

Take Futurama. I have it saved in Aired Order, the scraper set to (thetvdb) DVD Order won't scrape it correctly as the shows are saved in Aired Order. Fine. I remove the incorrectly scraped Futurama from the library and set up a separate entry for it in Aired Order, then it is scraped correctly.

Yet I also have Scam City saved in Aired Order and the DVD Order scraper scrapes the folder correctly.

This is an anomaly. It's not a big deal, the bottom line is everything is scraped correctly. Just curious as to whether this behaviour is normal.

Thanks.