That could be a misunderstanding about measurements of time. If, instead of counting in years, they were counting moons ....

"When I use a word," Humpty Dumpty said, in rather a scornful tone, "it means just what I choose it to mean—neither more nor less."
Lewis Carrol - Through the Looking Glass

There are those who would have us believe that every word in the Bible is true, rather than it just being a story. Beware of cherry-picking "facts" from the Bible as evidence of anything.

DC