Why doesn't the little yellow flower in the right corner on the envelope, of my inmail box show up anymore?

Because the email is not "in transit" or it does not remember it as being a new message. You see, just like anything else, the system that detects new or unread messages is still imperfect, thus allowing for occasions in which you are not notified of new emails. However, you might want to make sure you have new emails activated as one of your "alerts."