my friend has this problem as well. let me explain about what you all fail to notice this is game glitch. my friend has an issue with portals not appearing when she puts file sin exports portals never appear i ahve double portal glitch. and i'm fed up with nothing being done to fix merely reinstalling fh doesn't help in my friends case or mine either.
one of th emaps i play i can't get inot it is the same situation as amy here but i am not redownloading fh for one reason it won't work.
it seems like since the server was fixed theres only been more portal/map/cape glitches.
Firstly, only Kovu can update the game and hes busy half the time, so be patient, along with ur friend and your own problems...
Get your friend to place the map inside their terrains folder instead, some maps only read through there.
With your Double portal issue this is in same area, if you made the map and exported it, you get two portals, why? Because one is leading to the map maker version so even some meshs wont show up, the other leads to ur export version. To have just one, remove you map file in terrains and save it if u ever wanna edit the map. But place it out of your FH folders~