Personal Lists Counts Inconsistent

When I select “Profile” and then “Personal Lists”, I see a display like this:

Note that the “Completed” personal list count is 641 items, and the “Ken Burns Films” count is 39 items.

Now, If I select the “Completed” entry, I see:

the detailed list showing 639 items, and if I select the “Ken Burns Films” entry, I see:

the detailed list showing 38 items.

Why would these counts not match. Counts on all my other lists do match. These two are consistently off. I have looked a long time, and cannot see any reason for this. At least on the shorter list, the detailed list count is correct. I didn’t want to manually count the other one.

Thanks