Western Governors University - Military

I am just under full time right now and will likely be able to accelerate some courses towards the end of my term which would put me at over full time. How does this work with the VA? They certify at the beginning of the term. If I accelerate a course can I re-certify and have my monthly payments increased? Can I be back paid GI Bill payments as if I always had the course in my term, give the way WGU works and how most people do one course at a time? Even though the VA certified me for 15 credits, in reality I’m not taking all those credits at the same time. Accelerating a course would put me 18 credits this term, so can I be back paid for 18 credits for the entire term? Hope what I’m asking makes sense.

Thanks in advance for the help and feedback!