Age of Strategy Forums

My first impression about cathedral was units could attack from inside like fortified bases (barrack, stabke etc). I tried but they cannot; even healer cannot convert or heal from inside.

Is this the way or a bug?

Till date, i haven't witnessed any ability summoned within fortified Garrison, while some of them are abled within towered Garrison. So it would probably be intentional.

It is.
Cathedral is not supposed to be a garrison for fighting, but more like an emergency hospital.