I have noticed some of these little details on interior pages, covers, etc. as I look for ideas for trivia questions.
So, this week I have two questions some of you might consider a little tricky. I need both answers to declare a winner

When I saw the ads for the cover to Dark Horse's Usagi issue 150 it gave me an idea for this weeks questions.
There are at least two clues in this post.
I will add a couple additional clues if I don't get any answers in a day or so.
1. When is the 100th issue not really the 100th issue?
2. When is the 200th issue not really the 200th issue?
PM your answers...good luck!