No, do not write an addendum for this. You'll just be drawing way too much undue attention for a minuscule difference. It will just be another thing for an adcom to read without adding value which is something to avoid.
LOL thanks for the edit, @"Dillon A. Wright" , I was in fact joking...unless I suffer from multiple-personality disorder and that edit was actually made by my second (more serious, less friendly, possibly more attractive) persona. Yawza.
@Matthew524 More than likely yes. I looked on their site for the specific test they require but couldn't find it. But I've gone through a battery of tests in my lifetime due to another neurological disorder I've dealt with.