The stack size for the wcts are >1 so you can stack them and then insert a magnet/booster card. It then applies that booster card/magnet card to all of them, even if you only had 1 booster.

WirelessCraftingTerminal-1.10.2-0.1.29.jar

thanks for the report :) will get it fixed asap

fixed in v0.1.31