@Helldog
Sorry, I linked that thread to highlight the staff acknowledgment of a display-only bug in many achievements on the achievements page where the status isn't staying Claimed; if the achievement is showing as complete in the game DB but as incomplete on the Achievements page, you are experiencing the known bug, and the 'fix' will have to be done by the devs when they correct the achievement page display logic.
Sorry, I linked that thread to highlight the staff acknowledgment of a display-only bug in many achievements on the achievements page where the status isn't staying Claimed; if the achievement is showing as complete in the game DB but as incomplete on the Achievements page, you are experiencing the known bug, and the 'fix' will have to be done by the devs when they correct the achievement page display logic.