No, do not draw undue attention to this with an addendum. It's one class and it's really not a big deal in the grand scheme of things. You want to write as few addenda as possible.
Thanks everyone! Appreciate the feedback and reassurance. It can be tough to step away from the LSAT grind but I feel like once I have my course work "house in order", I'll be able to give my full attention to studying and do better work overall.
... be sussed out by paying attention to those indicators.
Indicators ... , beneficial etc I also pay attention to words like "conveniently leaves ... the general practice of paying attention to these kinds of words ...