[NFP] [1.0.1.501] Meteor shower two units (one on purchasing tile, one on touching)

[wesplaysciv]

Using some mods for UI. For gameplay, only "starting scout" and "expanded initial vision".
In my recent game a meteor shower game down near my city in unoccupied territory. Another civ and I both approached it. I decided to buy the tile so they could not enter, and I received a knight immediately. Then when my unit moved in to the tile (which was the next turn), I received another knight