These short chapters are just plain evil!
This is actually the average amount that sensei puts out. The majority of chapters run from 7-23 pages, with only a few having more than 26. A number of people have already gone back and counted the amount of pages to demonstrate this, so sorry! It is quite evil, but she is actually writing two mangas at one (Crimson Spell is the other one) so she just can't produce anymore than that. *winks*
Talk about revenge being a dish best served Cold!