You guys are so cute getting worked up about this. I find it surprising that you find this so surprising. The WBTS is committing a massive fraud - that is obtaining an advantage through deception. They have been doing it for nigh on 100 years. What you have uncovered up is nothing short of standard practice. That is not to denigrate the good work in showing how brazen it is but my guess is that WBTS publicatioons are riddled with this sort of intellectual dishonesty. If they were a commercial organsation they would have been indicted for conspiracy to defraud a long time ago.
In my case (and I suspect other's) this is useful for a couple reasons.
Firstly, it's recent. You can always point to stuff in the creation book, but JWs are so focused on what's current (new light and all that) that they'll just brush it off as insignificant. Also, with the creation book there's the excuse that it was written before the internet so fact checking was more difficult for them to do, so of course there will be a few errors on quotes, etc. With this new awake, you can find the source of the misquotes in about 3 seconds online, so there's no way anyone can claim it was anything but intentional. Additionally, anything not available on JW.org is immediately questioned unless you have a physical copy. Then, if you have a physical copy of something written before you were born, they'll immediately assume that you only aquired it in order to try and create doubts, which then leads to the assumption that you found out about it in the first place from an apostate website. Once there's a hint that you might've viewed an apostate website, nothing you say is credible to them anymore.
Second, it's not open to interpretation. The WTS has totally taken the place of God to the JWs, so it belongs to them the sole ability to interpret scripture or translate manuscripts in any way that they see fit. In this case, the WTS has (and fairly recently, at that) condemned quoting out of context, and it's certainly obvious that they did just that.
Third, it's handy because this is something that you could plausibly have found and you can show to someone without them immediately asking "Have you been going to apostate web sties?" If you challenge doctrine (especially the blood doctrine or anything to do with pedophiles or a whole host of other things) the first assumption is that you had to have gone to an apostate web site to get your information. In this case, the information is clearly available from a google search and requires no apostate information, so it can get past the charecter assasination that the WTS constantly ingrains.
I'm not getting worked up about it because it's surprising (well it was a little bit, I figured they'd up their game now that we're in the information age...their last two creationist brochures did pretty good at avoiding misquotes and just relied heavily on misdirection and fallacy) I'm excited about this because it's something that might be useful to me in my endeavor to wake up my wife (or at least explain why I no longer want to be a part of the WTS).
Edit: wow that got really long. I guess I am a little worked up. I guess having a clear goal that gets me closer to freedom is exciting.