Dendrobium nobile growth

Hello!
I have two Den. nobiles growing outside at the moment and I am wondering if what they are doing growth wise is normal. So both of them have matured a few new canes a while back and are growing a new set of canes again. I was thinking that maybe its because they're cycle was disturbed since they were probably baught blooming out of season (I don't know exactly because they were given as a gift to my mom). Correct me if im wrong but aren't new canes supposed to mature in the fall?

Thank you for all the replies in advance!