... because you dont win games by having spare resources lol... :S
when you run out of supply your ships wont build, so your dilithium goes up until you have enough to buy some supply, then your ships start building again.
the only time this doesnt apply is if youre building ships that cost more than 600 dilithium... then u ahve to do it urself.
er yeah im not an idiot i know all that,

, im saying that how can you make a queue out of an instant build item (obviously when you have enough to build them).
oh yeah and supply cost A LOT more tritanium than dil