We've noticed as you might have an increase in the amount of substitutions lately. What we just figured out was that the "assortment packs" were throwing our inventory way out of whack as they were not being processed properly by our inventory system. We are going to correct this by having weekly inventory checks and this should help considerably.
On your end you can help us out this way. Writing "no subs" is pointless unless you want your money back if the item has run out. In most cases we find people do have second choices, but we end up writing "what do you want?" further delaying your order. What you can do is instead of writing no subs write down your second choice in the comments section..second choices is even better! No one wants a sub of course but sometimes they are necessary. If we know what you want subbed in advance it will help a lot.
That said we are hoping our vigilance on inventory updates will keep subbing to a minimum!