Hmm, I'm not really sure however this might be worth a shot. I've never had this problem before
Select "My Webcam."
In the window that opens, click the "File" menu, select "Preferences," and choose "Webcam".
Click the "Camera Settings" button.
There is usually a checkbox for "Invert Image" or "Mirror Vertical." Uncheck this box if one exists. If you can't find this checkbox, try searching the other tabs.