So, I'm well into the game and I notice that the "choose a spell" indicate hasn't popped up in a while.

The box at the top right that indicates turns until you can choose another spell just shows this "--", and when I scroll over it the pop up says  "you have not yet picked a spell to research".

This is strange. Did I somehow miss a turn when I should have chosen a spell and lost the ability to ever choose another one?

I realize that there is a maximum number of spells you can learn, but I don't think I've chosen that many spells...

If it's working as designed, there should at least be a notice that I've reach the maximum number of learned spells.

Otherwise, I believe this is a bug.

https://www.dropbox.com/s/m6redl1shzl3wa3/Screenshot%202015-02-26%2021.58.13.png?dl=0