if you need top rudder then you are not correctly holding off bank with opp aileron.
One thing when doing my instructor rating when conducting the steep turns lesson we were taught to make sure student was not using top rudder as you are flying out of balance.
if you are not stabilised in the turn, reduce angle of bank, re stabilise and rolll back to 45/60 whatever the required AOB
The instructor prob didnt know any better, maybe you should point it out to him, or talk to the CFI, as its not a good thing if this instructor keeps going like this as he will instruct students who go onto being instructors teaching the same thing!
4S