Cold Steel, don't lose too much sleep over your questions. It's a complicated Socio-Historical process that, like all things related to the Jehovah's Witnesses, has to do with the power and control of their leadership than anything else.
The Anointed have been an Organization paper tiger for at least 70 years. The word used to refer to any member of the Bible Students Association. Then Rutherford, who was nowhere as imaginative in conjuring up new doctrines as his predecessor Russell, decided to simplify the number of spiritual "CLASSES" that Russell had bequeathed the Bible Students, as Jehovah's Witnesses were then referred to.
There were four (maybe five) classes; two Heavenly Classes and two Earthly Classes (Think spiritual aristocracy). The original Bible Students were only of the Heavenly Class (The first one, I thinketh?) and the Earthly Classes were nowhere in sight, just prophecy. Also, they were growing in numbers, so they didn't want to surpass the 144,000 mark that defined the first Heavenly Class.
So Rutherford simplified things by making two classes that stood side by side. The Heavenly Class that was defined at that moment made up a substantial portion of the Witnesses but as time passed their numbers diminished. They were basically referred to as the Anointed as time passed while the Earthly Class started out with all sorts of macabre names like the Jonadab Class.
Since the Organization is a power mongering entity, it did not seem proper that their higher echelons in Bethel be made up of just any "Class". It had to be the Heavenly one, until that is, their numbers diminished and the remaining "Anointed" grew older in age.
Since most of them never had any privileges or position of power in the Governing Body, they became, in due time, an empty symbol. The real prestige in the concept of the "Anointed" became embedded in the Governing Body. Currently, the "Anointed" outside the Organization's Governing Body is dangling on them like a limp, paralyzed tail.
At this time of night, I'm sure I've made some mistakes and forgotten a few details but I hope this helps you. You may want to contact one of our resident scholars such as Leolaia, our beloved Synesthetic. She'll provide enough details to give you nightmares.