1. Glitched runs require a major glitch to be considered glitched, and sprint cancelling isn't that major
2. Due to the sheer amount of glitchless runs using the technique, changing them to glitched would not only take a ridiculous amount of time, but also pit a lot of good runs against the much faster runs that use out of bounds

I'm not a moderator, but I feel like this is what they would tell you