I'm not sure the Chronological Bible has everything in exactly the right order, either, but it's a lot closer than the way the traditional Bible is set out.
The entire text of the KJV is there, but where different books of the Bible record the same events (sometimes using the same words, even) those passages are put next to each other. So, for instance you have something that is recorded both in Kings and Chronicles, those are right next to each other. When Kings and/or Chronicles mention a certain king and we know that a particular prophet's ministry was during that king's reign, then the appropriate passages that prophet wrote are inserted at that point.
It's just another study tool, that's all, as it helps to have events laid out in approximately the order in which they happened. Most people don't study the Bible from cover to cover anyway; they skip around or look for different topics. If you're not comfortable with that, then don't use it.