You either have the wrong springs or too, many winds on the current ones. You could just live with it, but you risk potential injury to anyone whom might do what you did if the power goes out.
Obviously you do not know who may have serviced the door previously (if you do I wouldn't call them again - unless they were willing to fix it for free). I suggest going to
IDA | International Door Association. This is the International Door Association web site and searching for a reputable dealer in your area, and have them service the door. It might cost you $200, if you need torsion springs, but you will avoid the risk of injury too yourself, and anyone else whom may use the door.
There is a current lawsuit in Chicago from last May in which a child was killed by a malfunctioning door/operator. Named in the lawsuit was not only the assumed dealer and manufacturer, but also the Homeowner. You can find the story on WGN's website.
A door that flies up probably won't kill anyone, but it could damage someone significantly especially if it somehow fell out of the track. Play it safe. Have it repaired. It will also help your garage door opener last longer by taking some stress off of it during the downward movement.
Ryan