When the achievement system was introduced, these two achievements had a required map that was inaccessible in GMS. To rectify this, Nexon removed that map as a requirement. This meant the players who had visited all maps except the inaccessible one were left with a bugged achievement. All maps have been visited, and the requirements for the achievement have been completed, however, the achievement didn't update and get a stamp, and the refresh button that is enabled whenever Nexon feel like it doesn't award the achievements either.

This bug has been reported before, and it still not fixed. So I am reporting it again. And I will make a new post after every maintenance until it is. This is the sort of bug that shouldn't require major changes from the overseas team. The update button can either be changed to award achievements that have all requirements met, to safeguard against any issues like this in the future, or these two achievements can be reset, not much progress will be lost since the achievements take about 1 minute to complete.