The hunt bill link centers the map where the subzone name appears on the world map, which isn't necessarily the exact mark location if the subzone covers a large portion of the map (like Outer Circuit does).

You're going to run into the same problem with many marks in other expansion zones, not just limited to Endwalker. Heavensward was especially bad. Smoldering Wastes in Dravanian Forelands centers off the playable part of the map when you have marks in that subzone. Twinpools in Coerthas Western Highlands centers on the westernmost edge of the map even though it covers about 2/3s of the entire zone.