I have made Coppa a few times and let it sit for only 7 seven days before vacuum sealing. It was always stiffer, but it probably depends on the size and cuts. I have generally had good luck with the foodsaver vacuum, ( I use a V2461). Are you sure you placed the mouse strip in the right place so that air can escape from the bag? I agree with the previous post, if you used the right amount of instacure #2, it killed everything it could. I bet you are OK. Good luck!