The reason why these things appear to be contradicting is because they were. The inventors of the Christian religion knew that to make it credible they had to tie it in to the Jewish prophecies of the Messiah and this is what they did, finding pieces of texts in the old testament and showing that Jesus fulfilled these things, but all the while not looking at the context which once read, does not make sense, because as has been shown some of these texts were referring to Yaweh.
The WTS does a fine job of hiding these facts, but I firmly believe that they know the truth about these things, and this is the reason they barely give any credit to Jesus as other Christians do. As has been mentioned in this DB the WTS is more of a Jewish religion than a Christian one, no matter how they try to portray it. The truth is that the Old Testament and the New Testament is mostly BS, I have researched this matter thoroughly and am 100% convinced of this, I don't mean to offend the believers they are free to believe what they want.
To see reality, one has to put aside their preconcieved ideas and be willing to accept the truth no matter how painful and astonishing it may be, the reward is that you will be FREE from all the superstitions and beliefs that hold us humans back from reaching our full potential and the fear of some supernatural retribution if you don't actively worshipf some sort of deity which was invented by some priest thousands of years ago, if god wants worship he will appear to us just like it is said he appeard to those prophets long ago, and he will let us know, till then it's all hearsay.