Hi 1 more day,
Does your hernia make your stoma stick up? You may want to try a convex pouch system. That could help. Maybe the force of the output against the pouch has no room so it goes to the least resistant place. I have never used any ring for the Coloplast or Convatec two-piece pouches I wear. Did I understand you are using a barrier ring in addition to the flange of the two-piece system? Have you tried without the additional barrier ring? I know you must be frustrated. Maybe try some other products too. All adhesive is not created equal. Lol and even if it works for a while, they change it on you sometimes. Hope you find your perfect pouch.
Puppy