Thanks, guys. I know it meant nothing, I just hope he does, too. I haven't sent another one yet, I am still not sure if I should mention it or not. I don't want to draw attention to it. There is an old saying "less said sooner mended" that I am hoping applies here...
He is a busy guy and often checks emails on his phone rather than computer, so he may not even scroll down past my signature on the new part of the message...
So I think I will play ostrich at this point and see what happens