Just because one may have been recorded by Moshe before another does not mean this one is first and that one is second, etc. Hashem gave every command simultaneously. Every command of Hashem happened at the exact same time. Every command of Hashem is first. This is extremely important to understand because we may be tempted to discount the commands that may have been written later in the Torah.
Every command is first.
We understand this mystically. In other words, every command of Hashem is like the first or is as the first. Each command must be studied with the same fresh zeal. As an employer there is one interesting human behavior I have constantly noticed. The first day on the job an employee has more zeal and interest and enthusiasm than the fourteenth day.