If two or more effects attempt to modify how many counters would be put onto a permanent you control, you choose the order to apply those effects, no matter who controls the sources of those effects.

If you control two Loading Zones, the number of counters put on a creature, Spacecraft, or Planet you control is four times the original number. Three Loading Zones multiplies the original number by eight, and so on.

If a creature, Spacecraft, or Planet you control would enter the battlefield with a number of counters on it, it enters with twice that many instead.

The Loading Zone is for immediate loading and unloading only. There is no stopping in the Loading Zone. (Especially not if it was warped.)