While in my main base I copy & pasted via minimap the smelting layout and queued ghosts to be built in the outpost. I shift clicked in order to build over mountains.
The number of missing items shown in the alert stays constant but the quantities of each item keeps changing in a cyclical pattern (going from a maximum of ~90 furnaces to a minimum of ~50). I don't think these values should be changing because my outpost is in an isolated circuit network.
Screenshots of the values changing:


Video & Save are attached.