Leaking swaddlebees

Tried this question on TNN with no success, so hope someone might be able to help.

We have 1 swaddlebee pocket which I loved till last week. It's started leaking poo out the outer edge of the leg hole (i.e. it's not wicking through the PUL). It seems to be done up pretty tightly - I was actually thinking about doing it more loosely cos it is snug in the tummy.

Any ideas? TIA

I hated swaddlebees but that was cos they leaked full stop...not just poo. If they were good before, was it just a one off? 

Yeah, i was wondering that. I loved them when he was smaller because the skinny crotch worked for him (he's a runt) but now that he's chubbing up, I wonder if they're too skinny.

Good thing I didn't buy a bulk pack on TM recently (I was gutted that I forgot to bid, then 2 days later the leaking started - I'm no longer gutted).