Wait, this is a well known problem with the Browser. DIfferent limit for different people, maybe, but there is a limit to what the Browser displays and it's real annoying.
But there is a solution! Double click your bin to open it in its own window, and now you have lots more room to work with your markers, and the Browser is much more accepting of them. Don't know why it does this, and it seems real arbitrary where it cuts off.
another Scott