Today I went and purchased several of the Craft III techs and scribed them. I went to make an item, and the craft technique wasn't in my creation window and several Craft III techniques didn't show under knowledge either. I thought maybe I had missed the techniques, went back to the quarter master, then as I hovered over the techniques they showed as not scribed so I bought them again. However after making this purchase, these techniques could NOT be scribed though they appeared as not scribed in the NPC's trade list window.
Apparently I had reached the limit of the knowledge book - there was no error or warning, the techniques just would not show. I deleted several beginner formulas where I had scribed the journeyman formulas and my missing techniques appeared. So I spent over 25 silver on techniques that were already scribed but not showing in knowledge book
Please either increase the number of formulas/techniques in the knowledge book, split spells, formulas and techniques into 3 books or at least provide some kind of system response when the knowledge book is full!