Much MUCH more likely, you accidentally checked "Open at Login" when selecting it from the Dock once.
While Skype is open, click and hold on the icon in the dock. If the "Open at Login" has a check mark next to it, select it again. Problem solved.
Much MUCH more likely, you accidentally checked "Open at Login" when selecting it from the Dock once.
While Skype is open, click and hold on the icon in the dock. If the "Open at Login" has a check mark next to it, select it again. Problem solved.