Wow... I can't believe you'd sent them back.
I have several and never had any problems like you described.
The snaps are one way snaps, if you look at them you'll see a tab at the that bottom has to go on first, The straps will stretch so just snap the loops closed and slip your belt through them until they're broken in a little. Same for the fit, give 'em a chance to break in to your weapon. You wouldn't want everything to come loose would you?
If you do sell them I'll take them both! Please PM me.