Here is the thing - I bought Vortex Viper PST gen2 2-10x32 and it appears that the parallax markings does not match reality. I set target to 20y but I must set parallax to 30y to have a sharp image. lt looks like it focuses down to 10y instead 20y. I asked the store where I bought it and it appeared that other scopes have the same issue. Just don't know what to do. Does anyone had similar problem?