Yea, I've seen that before...in the same house where the previous occupants replaced a 15-amp breaker with a 30-amp one, melting the ground wire into the hot wire and burning it away, leaving the ground hot leaving the panel (if that gives you any idea at their skills. They stunk at plumbing, carpentry, and drywall work too.).
Those type of Scotchloks are not intended for solid wire, only stranded wire. (The other type that is intended for solid wire is for telephone use).
