Read and understand topics 126.96.36.199.1, "Elementary move rules" and 188.8.131.52, "Alignment rules" of the Enterprise COBOL for z/OS Language Reference, and you will understand why you get the result that you do.
"You have sat too long for any good you have been doing lately ... Depart, I say; and let us have done with you. In the name of God, go!" -- what I say to a junior programmer at least once a day