On load, Cvars::reapply_saved_presets writes the saved graphicsQuality rung (and the saved lightingQuality rung, else the Graphics rung's) over every governed row the file does not carry, so a row registered after the save follows the preset instead of its registered default. Rows the file carries and session-owned rows stay; Custom writes nothing. Tests for both ladders. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>