I think you need to make sure that you put your airfield on grass tile.
But I seem to recall one or more of the airfield groups gave me problem even when putting them on grass tile, it could be a bug or maybe they built them on rock terrain and it got copied when they save it in there Group name.
As for the reload, it must be built into the group file because it you select LAIRFIELD from shapes the only thing on it is the runways and the reload spots. I put it near another airfield and drove my plane to it and when on the reload splot and it rearmed me. If you check it using Edit Object it shows nothing there.
Pokie