First off, I want you guys to know, this is completely my opinion. I am Christian, but I'm not perfect, and what I'm about to say may or may not be accurate but will be what I believe as a Christian. I am not a pastor or theologian either so I don't know much about this subject. So please, don't take this post as a real investigation and professional opinion on this subject.
I have gone and read the posts and stuff in that link you posted, @Hanna_Brassheart. I definitely agree, some of the things they did there were completely not from the Bible and were not what I would expect from a Christian ministry.
But, when we go and study something and find a result...
We don't just assume that that's everything...
That song may be from that specific group, but not necessarily representing everything they do or believe in.
When they want his glory to fill the atmosphere, tell me. How do you think someone could achieve that? By making it, giving it to him. By worshiping him until the room is "filled with his glory". Or, it could possibly mean that they yearn for his presence to be upon all of them as they worship. Things that would actually be great for us Christians. If you don't think so, let me know.
Basically, we should yearn for his glory. We should strive to follow in God's footsteps. See what I'm getting at here? Our hearts should also yearn to see him glorified.
And when we ask him to overcome us with his presence, that basically just asking him to come and fill us with the Holy Spirit. Which, if you do remember, was what they sort of like to emphasize on there right?
Anyways, the organization there may practice parts of Christianity and things that aren't, and that means we shouldn't follow them as devoted Christians ourselves. Buuuuuut, that doesn't mean that they can't create things, ( or write songs), that will glorify God.
Anyways, I've looked at the more questionable parts of their organization. It doesn't seem like they're aimed at taking God's place or his power. More like being misguided in how we as Christians should act and upkeep the Word of God. I think both you and @Ilayne_Merespark made many fair points. So, this is not a "lets-agree-to-disagree" situation. This subject requires both prayers, and understanding that this also is just part of God's plan for the world and potentially a part of the prophecy of "false prophets".
Thanks for listening!