Slowbro from SV Base moved 140 damage to the active

So im playing a H.Goodra deck, with Slowbro, I had a Comfey in the active, im moving around damage from my Goodra to my Slowbro, and for some reason, Comfey takes 140 damage. I have no idea why or how exactly it happened, but maybe because I can hover over Comfey while I moved damage counters, Live got confused and just dealt 140 to it? (Side note: Goodra and Slowbro had 120 and 20 damage on them) Luckily my opponent was nice and conceded because of the glitch