Amazing mod !
The more I use it, the more I can't create a world without it.

I am not advanced enough to solve this, but here what I found:
I am also using WaterStrainer (10.0.0 at the moment) and when some enchanted books are collected with water-strainer, some won't be able to stack with crafted ones.

Many Enchanted Book collected with the strainer won't stack with the one created with an enchanted table.(like Efficiency 1, Power1, efficiency 1, Piercing 1).
Some of the enchanted books do stacks (Sweeping edge 1), (not talking about the multi enchant on 1 book, only the single enchant ones)

Piercing1 wont stack but Piercing 2 will. Looks like it's mostly Lv.01 enchant that are not behaving properly.

All the one collected via water strain will stack together, but those Lv.01 enchant will not with their crafted one counterpart.
It's like if they were recognized as a different item regardless the enchant name matching
Not sure if this an issue with StorageDrawers or Water-strainer.

Not a big deal, i just use a grinding stone on those, but thought it might be worth mentionning.

Anyone else having same issue ?

Keep the great work Texelsaur