Question Regarding Deliveries to Outpost

I made an outpost to help offset my copper demand and I'm trying to iron out the delivery system for it. I'm trying to have my main settlement supply everything to my outpost (pickaxes and food) while taking the copper back to my settlement. I want to have my main settlement do this because I'm producing at a surplus and I want a skeleton crew over at the copper mines. However, I am sending too much food and pickaxes over. I am sending pached eggs, fine stew, and simple pickaxe. I set to always load, keep rule and set that number to 3 (it is a 3 person camp so I figured this would be a good amount for daily deliveries), and to unload at my mine but my trader keeps delivering like 30 eggs and stews and as many pickaxes they can carry. Am I missing something or is there a way to limit this like I want?