Mine opens with no problem in average weather, but does get harder to open in cold weather. But once the cams are locked down they stay down. The alternative to the cam system are either knobs, wing bolts. spring clips(like others use) or the springy clips that Summit uses. I've always wondered if those springy clips might wear out or open up while climbing. Possibly there is a defect in your stand. I would hope not. To be honest even when I unscrew the knobs almost all the way out of the side braces, I still have to pull the braces out toward the center to slide them down when I am folding the stand up.
By the way.........I do want to mention that in no way am I affiliated with Lone Wolf. I am just a regular hunter who believes in that particular stand.