Changing NES dungeon to Overworld keeps relative coordinates

(Split from another bug report by AmazingAmpharos)
I pinned down why the Whistle Warps kept sending me to the wrong screen, and I think some other warp types might have the same "bug". Go to the Dmap menu, change the dmap type to NES dungeon, adjust the "frame", and then change it back to the overworld dmap type. Despite the overworld not having any need of relative coordinates and thus theoretically should always use absolute coordinates, the whistle warp will still use relative coordinates as though the adjustment you made while the dmap was an NES dungeon was valid. This is an easily avoidable issue for a quest designer(if you know the problem is there, of course), but it doesn't seem to be intended behavoir.