Spoiler problem

I have the OEM spoiler and I notice sometimes that the front bolts that hold it in place don't work...looks as if someone tried to rip it off. But I usually just punch the thing down until the spoiler bolts snap back into place. Anyway, is this due to high speeds?? I drive to college and usually do 75-85 all the way down I-95 North or South. I don't know if I described the problem well enough :?

Thanks