After removing the instantanium from the fan opening, Jo and Zane appear in the room, however, the fan, fan cage, and wire grid is still covering the opening.
When the charges detonated and the instantanium started to seal the underground bunker, you could for a few seconds still see the shadow of the fan in the airshaft moving even though the instantanium had already visually blocked the entire fan.
The address the bodies are being shipped to says Lackland Air Force Base, Florida. Lackland is located in Texas, not Florida.