i know this is an older thread, but i made the same mistake myself with the first kit i ever made, about, oh, 7 years ago.....it was a WE VR liebfraumilch....instructions said you may have more than 1 pkg of like ingredients, and if so, add all at same time...well at that time, both the concentrate bag and f-pack bag, were the silver mylar style bags, and except for the f-pack one being smaller, looked like the same thing....i was entirely new to winemaking, so what did i know about f-packs???....lol...so after reading through the instructions AGAIN for about the 4th time, i said "oh S*#@", and realized my mistake as i went looking for the "f-pack"....so i went to WE's website, and sent cust. service an email....i received a prompt reply, but because of the information i needed to supply them with, such as where i purchased the kit, unbenounced to me, they also forwarded my lhbs my email, as well as their response....it was funny, i went walking into the store, which i had already began to become known at, and the owner right away mentions that he knew about my little dilemma, and that WE was preparing to supply me with a replacement f-pack....unfortunately though, because of inport/export laws and such between canada and the u.s., they could not ship it directly to me, so they shipped it to my lhbs....at the time, WE assured me all was not lost....all i had to do was continue to give the must a good stir, and get some oxygen in there during primary fermentation, and that the affects of the sorbate in the f-pack could be overcome....except for having a higher abv, the wine actually turned out very nice...i'm sure we've all made mistakes in the beginning, but the trick is learning from those mistakes....just figured i'd share my little story....just hope it didn't bore anyone to tears....lol...