With TV series that have specials and a chronological order having the specials as independent listed items as well as the TV shows series misses the chronological order.
If the specials were added to their chronological place at the end of a series then the whole TV series bundle could be watched with ease.
@Anonymous User I agree with you. However this may be down to how the rights owner for a particular series sees the specials. Do they see them as an integral part of a series (as we do), or do they see them as stand-alone episodes for which they can charge a separate licence fee.