Problem With Name At Reservation Times

my profile no. is 119799433 - I take a flight every 8 days from edmonton to kelowna  and i have an issue with my name  - legally it is malcolm stewart campbell - but i go by stewart m campbell and i always have difficulty when proceeding through the gate - i need these two names to be recorded as same so that i can earn my westjet points I like to use westjet because the flight is more enjoyable and there is more leg room please advise that my profile has been amended to reflect my name  thank you