It's a transition issue not a click. Here is what will fix my issue. If you transition from a monitor 25 percent from the top it should transition to 25 percent down the new monitor. Right now it works like if you transition at y = pixel 500 it goes to pixel 500 on new monitor. Your alignment options seem to only offset so it doesn't help me. It looks like if I put 100 in for vertical and I transition at pixel 500 it lands at pixel 600. Your software is pretty flawless except for this one issue.
That's why I suggested polling the monitor for it's resolution and then making it percent wise. It will work exactly the same as it does now if both monitors have same resolution but if 2 monitors have a different resolution but same screen height dimension (can happen with ultra wide vs wide vs old standard monitors) then it can help make the transition happen in same place.
An option to do this would be awesome. Other mouse sharing software products do this by default and in my situation where a 1440p monitor has same physical height as a 1080p the transitions when monitor is up next to each other is flawless.