OK I know I've got the name of these wrong, I mean the ones that are supposed to last from newborn to toilet trained. I bought a whole load of these when DS was born and we have been getting on great with them. He's now 8 months old and he appears to have outgrown them. He's quite tall (95 centile) and also 75 for weight. But given that these are meant to last until they are toilet trained (which must mean they fit two years olds in theory) this seems crazy. Am I doing something wrong? Is anyone successfully using these with older children? Or is this a well known problem? Really don't want to spend a fortune buying more. The reason we went with these was as an investment....