Added a third monitor (in a lego L formation), however now other machines reset their mouse to lower left corner.

I used to have this configuration on my main PC, and my multiplicitied PC's are like:

Main: [ x ] [ x ]

Multiplicity setup: [Main] [ x ] [ x ] [ x ] [ x ] [ x ]  

However, I changed my main configuration to:

Main:             [ x ]

               [ x ] [ x ]

Now whenever I try to scroll to my other machines to my right their mouse cursor resets to the lower left corner of their screen forcing me to move right + up every single screen instead of a seamless transition?  

I confirmed the new Main-PC configuration was the cause by shifting the new third monitor to the left of my original monitor (so now everything is a straight [ x ] [ Main Monitor ] [ x ] configuration. 

Is this a known limitation with Multiplicity? It's super awkward to move left to reach an upper-mounted monitor, and I prefer compact designs over a spread-out circular design!

Thanks!