Have you spilled anything on the keyboard? Do you have the ability to remove it? Maybe turn the unit upside down and shake gently?
I do not use Sticky keys, but what you are seeing is not how I understand they work, and I do not know of another way to make it do what you say.
Do you show a keyboard panel in the Control Panel? If so, you may have a custom key settings. Perhaps something has gotten set in that.
Most laptops use a special utility to set specific keys, like open the DVD drive. Have you installed that or is there any other software that might change certain keys?