NJ....sorry to hear that. Seems strange to have 2 that would do the same thing. I have an SII also on my Knight M/L, but its a 3x9 and have never had any problems with it. It does not have the paralax adjustment however. IMO these are really good scopes for the money, maybe someone else can answer your question. What does Sightron say about it? I can imagine it is frustrating for sure.