or.... it could be the case of the "yom"
The word Yom was used several times in Genesis oft having different periods attached
In Genesis 1:5 Yom is referred to as a period of light, (literal would be 12ish hours?)
It appears all six creative Yoms were referred to as a single yom in Genesis 2:4. (if you believe somehow that each yom was a literal 24 hrs, thats at least a week? I imagine these yoms were far more than that)
In Genesis 4:3. Cains crops grew in a single Yom (a few months?)
In Genesis 43:9 Moses declares that he shall bare the blame for Yom (eternity?)
and so in Genesis 2:17 The Yom in which God told Adam he would die within still allowed him to to live to 930 ( Perhaps 1000 years?)