Hi,
I went through this pain aswell. I rang and complained to Snugglers and they sent me a whole new pack! I was quite happy with the response encase you have to ask, and she went through some details with me and I think I was not going up a size earlier enough. I was going on my childs weight.
Sometimes the nappy leaks because it can't keep up to your childs frequency or volume of ..... wee. As they get older they are able to produce more.. so if your nappies aren't getting it all, it might be time to go up a size, as they increase in absorbancy, at least that is what I was told.
Aldi nappies are the bomb.. they work and they are a fantastic bargain price.
I use Huggies at night and Aldi's during the day.
Good luck, but I am sure you would have got it sorted by now..
Kristy