Ian, I am amazed that you left out of your comment Hamlet's instructions to the Players. "...Suit the action to the words..."
On a personal note, your self description sounds like a specific form of "dyslexia" in which the intended thought comes out differently when reaching the tongue.
When giving explanations in class, keep in mind why your students are there. Sometimes we achieve a level of insight which we need to share. However, many times our students just need to practice, practice, practice.
Practically all Aikido instructors would greatly enhance their reputation by actually thinking through their insight and quite possibly write it out and make the necessary clarifications PRIOR to presenting it to their students. We tend to "shoot from the hip" and hope that it comes out "right".