Hmm, I don't know how to change this, if it's not immediately obvious to do.
IIRC, the next Character Builder update (scheduled next week) will have the abilty to disable individual power cards, which might help with youre house rule item idea.
It is possible that the printed version of the character builder will be more readable - simply because you don't achieve the necessary resolution/closeness on your computer screen. But there is no way around it so far - that's the length of the text, it has to fit in there somehow.
I don't know why it wouldn't save more than one houserule... But I haven't used this feature much yet..