Thanks for posting! I’d be happy to help with your display settings.
There are a couple of things that might be happening here. You don’t mention how you have your displays configured when the adapter is plugged in to the laptop. Are you duplicating the internal display to the external, or are you extending it? If duplicating, what is the native resolution of your laptop display and what is the native resolution of the monitor? There are a couple of scenarios in terms of the resolution settings and how Windows 7 is scaling the displays that could be causing the behavior you describe.
The best way to proceed would be to get more details about your setup. We have developed a utility called PlugDebug which gathers some information about your system. It is available from this link:
If you run that application it will gather all the details of how the display settings are configured for your system and create a .ZIP file on your desktop. Ideally you would run the program twice, once with the adapter disconnected and a second time with the adapter connected and the external display attached. That will allow us to see the difference between the two. It would also be helpful if you could take photos of the whole setup with your smartphone so we can see what you are seeing (again, two shots showing the before and after).
If you could gather that information and send it to email@example.com with ‘Ticket 89395’ in the subject line we can go from there.