I'm on the wrong end of the country, and I don't have anything as fancy as a Leica or a Voigtlander, so really I, like most other people on the internet, am useless to you.
But since I'm on the internet, and that means I love reading my own writing, here goes
As Bernard said, rangefinder systems go out of sync. Many have a simple way to adjust them (I don't know about the S2). My Yashica Minister had a set screw at the centre of the back top plate. unscrew the protective cap, then set the camera on a tripod. Run a tape meausre from the film plan to sometihng high contrast (ie east to focus on) exactly 10 feet away (or 6 feet, or some easy marking on your lens) and adjust the set screw until the thing is in focus.
I rattled my Yashica out of focus on a motorcycle trip. Ten minutes of light effort and it was focusing perfectly again. It's worth a try.
Depending on your tastes, look for a cheap FSU rangefinder on kijiji. Yes, they are quirky and imperfect. They are not Leicas. But the contrast patches tend to be brighter than the fixed lens rangefinders I've played with, and the controls are similar to LTM Leicas, so they'll give you a taste.
Admittedly, it may be like trying to figure out if a vintage Porsche 911 is for you by test driving a rusty old VW Beetle; but then some of us like those too.