I have the exact same issue CDLeaver, and think this might be a bug, where a retina display laptop is connect to a non-retina second monitor.
- What I discovered is that when I move my secondary screen so that it is positioned above the primary macintosh screen, the InDesign document window on the second monitor continuously repositions itself, it continuously jumps when you move it into position and then start working on it.
- Once I lined up the tops of both monitors in the System Preferences > Display Preferences, the problem went away.
Thanks! This did solve my problem with jumping windows. I’m still having issues with open/save windows that are cut off at the top by the menu bar making files near the top not accessible!
Hmmm... I don't see that issue here. Something to try: reset the workspace you are working with.
- Window > Workspace > Reset [workspace name]
- from the workspace switcher (top right of your screen), choose Reset [workspace name]
Hoping that will clear the issue with the dialog boxes?