YES. It is all very typical. With him calling for you sounds like your bird may very well be bonded to you since I assume he's your only tiel. Some of his screaming may actually be hormon's or feather molting. The later can be uncomfortable for birds and put them in cranky moods. As to chewing on his ladder, that's very typical. Cockatiels love to chew on wooden things! You might consider putting more colorful ( bird friendly ) toys in his cage.