I no longer have a monitor with my virtual machine and the other with mac

Before a few updates I was able to have my virtual machine up on the right monitor and the mac on my left. However, since updates if I click on anything I have open in the virtual machine it opens up on both screens. (the window opens on the left screen and it is the main background on the right screen). If I click on anything mac it will only open on the left screen. Which leaves me unable to work with my mac and virtual machine on each monitor at the same time. PLEASE HELP ME! ITS DRIVING ME CRAZY