Me too.
Don,
I have the same problem, but have ignored it. I think it only happens if there are comments on the very first rung. I'll test in the morning. The problem I have is when I scroll up with my touchpad, doesn't quite go all the way. It shows the first rung, but not the rung title. I have go manually go to the up arrow on the right-hand scroll bar to finish going all the way to the top. Sounds like the same issue you have.
Greg