Not being able to auto apply postage to orders with more than 1 product is a huge pain point of the process with Click and Drop and adds hours onto our day when processing hundreds of orders. The only problem i can see is that we have had to add packaging and inserts weight on top of the product weights into Shopify product listings so that when the weights pull through to click and drop and follow a rule through to automatic posting for single product orders they are absolutely correct and we therefore do not get surcharges for incorrect declared weights. If the rules applied the postage to multiple product orders it would then add packaging and insert weight multiple times meaning that our final parcel would be overdeclared weight wise and we would be surcharged. However it would be extremely helpful to be able to have actual weight of just the product in our website product listings and then a rules section in Click and drop to be able to calculate the correct add on packaging/inserts weight eg if product is X x 2 then postage weight add on =Y, if product X and product Y then postage weight add on = Z etc .