Update
A big "thank you" to all who responded. The best answer: the earth is not flat.
I was sent the following link: search section, township.
I am very familiar with this link (EarthPoint) but haven't used it in awhile except to check out an example: when you go to the link, for example, and type in North Dakota, 5th Meridian (for all of the North Dakota Bakken), and then type in T148N-R49W, section 22, you will see that this "640" acre section is, in fact, 617 acres. Just one more reason why probating minerals is so expensive.
Original Post
Elsewhere, they are asking why a 1280-acre unit has a well that actually has 1,284 acres. I think the "answer" the folks are positing is missing the mark. It seems pretty obvious to me but I will wait to see what others say.
The first response was that the NDIC had made an error. That is certainly incorrect. The NDIC is not in error here.