Basically, for glitchless, 1.1 is faster then 1.0 since the 1.1 update introduced the dash feature which normally on 1.0 isn't present until chapter 5 & wasn't a viable form of movement, it was incredibly slow. Because of 1.1 being the most obtainable version of the game as well as the fastest, it means that there is no seperator for glitchless since there wouldn't be any point of having one. With 100% and other glitched categories, 1.0 has some glitches which were patched out in 1.1 meaning 1.0 is the fastest version for those. However because 1.1 is the default & most accessible version, to keep the run more accessible to people, that's why the split is there.