Well, it is a statement of "faith". It is what the members of that church jointly believe. It is important to put that statement out there to maintain the unity of that church. If you don't agree, go somewhere else.
It is saying if you don't agree, then don't come here and start trouble. There is nothing wrong with that, there are other churches that will accomodate that person's differing view.
You miss the point. A "Statement of Faith" is another way of saying "This is what we believe, teach, and preach." As C4K has said, everything in this should have a biblical basis (see
The Baptist Faith and Message for an example). Each point of the statement should have scriptural backing that actually backs up the point.
Putting anything about any translation in the Statement of Faith goes outside of this, becomes abiblical as Roger put it. Since there is nothing in the bible to uphold any specific translation any mention of one moves to the realm of man-made doctrine and supposition.
Yes, God promised to preserve His word and He has. He has not, however, said exactly how He was doing it, nor has He said in which manuscript family (if any). No man can point to one manuscript or even one body of them and say, "This is it." If God thought it was worthy of mention He would have told us. Since He didn't it isn't worth any bother. Of course there will be some like yourself who will continue to harp on it, trying to make out how this one is THE ONE, arguing from your own thoughts instead of from what God has said.
It is sad enough when an individual bows and worships a translation, but when churches put it in as a part of their doctrine... If there could be tears in heaven, it would be those shed by God Himself over such garbage as this.