I have sent all of these (and more) to Support but I have not heard what the plans are to fix these issues. If I had not caught some of them, then I would have ended up with garbage prints of various flavors.
These Screencasts include examples of overlapping objects, objects off the platform, objects partly on the platform, objects jammed up at the front edge of the platform, and objects jammed up against the back edge of the platform. In none of these cases was there a warning or an error message that they would not print correctly.
All these were after I have selected "Center and Arrange"
As I continued to try things, I ended up with the examples at the bottom of the list. Some of these were experiments to see if I could figure out what was going on. In addition to these Screencasts, much more detail about the process was provided to support including test cases so they could verify my findings.