Maybe the angels are the holy spirit. Wikipedia talks about Holy Spirit here http://en.wikipedia.org/wiki/Holy_Spirit and it also states the JW view. One thing it says is this:
"Jesus relates in Mark 13:32 'But of that day and [that] hour knoweth no man, no, not the angels which are in heaven, neither the Son, but the Father.' The Witnesses note that the Holy Spirit is conspicuously missing from this statement, just as it is missing from Stephen's vision in Acts 7:55, 56 where he sees only the Son and God in heaven."
Maybe the Holy Spirit isn't missing? I don't know, just a thought.