Statistics on research page drops

[Pozzey]

I have been thinking for a while now that mage drops are very rare, so I decided to do some investigating today.

I've spent 9 hours in unrest killing 24-33 mobs which, according to the wiki, have an equal chance of dropping a research material.

We were clearing the entire basement cycle at a solid pace, ahead of respawns, aside from 2 cycles where replacements were coming in. There were 22 mobs that were being cleared at a rate every 21 minutes. Approximately 594 mobs were killed during our extended session.

Here are my (actually quite surprising) findings:

84 necro pages.
62 chanter pages.
36 wizard runes.
0 mage pages (but 1 gloves of rallos zek dropped...).

The level of imbalance is so severe that I'm seriously considering that there is a quite fundamental bug, rather than just a decreased drop rate.

I am going to continue to monitor this as I progress through the levels. Any other thoughts as towards why this is happening would be useful to assist me.

GMs - I would also welcome your thoughts...