Allow head glitches/clips in Speedrunner of the week?

[Mia]

Usually contests don't allow glitches to make it fair game, but this contest is slightly different since everyone uses shortcuts to achieve a faster time.

But that's my point; you can't allow glitches, but clipping your head through blocks isn't a glitch. Which confuses me as to why it's still more commonly referred to as "head glitch".