The Torah was edited with great precision. This is the idea behind the notion that "there is no chronological order to the Torah". Items are placed were they can teach the greatest messages—form can be as important as substance.
“These are the commandments that G-d has commanded Moshe to the children of Israel on Mount Sinai (Vayikra 27:34).” Though it is the Book of Exodus that we associate with Har Sinai, it is at the end of Vayikra that the Torah actually places us there.
“I am the Lord your G-d, who took you out of the land of Egypt”. While we associate these words with the first of the aseret hadibrot, the words above are actually taken from this week’s parsha. “If your brother becomes impoverished...do not take from him interest…I am the Lord your G-d, who took you out of the land of Egypt to give you the land of Canaan, to be your G-d ” (Vayikra 25:38).