The Church of Jesus Christ of Latter-day Saints

The Church says that this section 89 of the Doctrine and Covenants is a commandment. My question then is...if it really is a commandment from God why then has their not been an amendment to the D&C? Instead it continues to read that it is was "Given for a principle with a promise" and ...

Thank you for your response. That makes sense. I never fully understood until now. I appreciate your time to answer my question.

For this year we are studying the New Testament, correct? It is my understanding, correct me if I'm wrong, that next year we will move onto the Book of Mormon. If I am correct then my question is, "Why do we have to complete a book of scripture, ie. New Testament or Book of Mormon, in one year?...

During times of war, for example WW1 and WW2 did the church still send out young men to serve full time missions? Where can I find written documents addressing this?

How can I get a copy of this bit of information. I can't seem to find Handbook 1 only Handbook 2.

What if they were never presented at Stake Conference and it has been almost 10 years? Is the ordination null and void?

Is it necessary for those who have received the Melchizedek Priesthood to have it announced in their Stake Conference? Is it okay if one was missed? Why do they announce them?