Third-World Voting Problems

 I read through a piece today by Judicial Watch.

They did a review (Sep 2020 study).

353 US counties....had 1.8 million more registered voters than actual Census counted eligible voting-age resident-citizens.

That translates to these counties having eligible voters than possible (exceeding 100-percent).

The states with 100-percent exceeded?  Alaska, Colorado, Maine, Maryland, Michigan, New Jersey, Rhode Island, and Vermont.

How is this possible?  Either the Census system is broken, or counties are doing a screwed-up process of handling registered voters.