I could try and get some screenshots next time that happens
EDIT: I got the screenshots. Clicky for big
Ok so in this one, you see that the toast has come up (i had no conversations running at that point), and the little taskbar thing is on the first monitor (the 24") instead of going onto the second monitor like its supposed to.
At this point, i have clicked on the convo in the taskbar of the first monitor, and it has popped up on my second monitor where it is supposed to be.