Do try the other suggestions, too, especially the one about tightening the load lifters. I didn't think about that one--I have such pressure-sensitive shoulders that I have to make sure the load lifters keep the top of the shoulder straps from more than barely touching the tops of my shoulders! So I didn't even think about the consequences of loose load lifter straps!

I ran afoul of those male oriented pack loading directions early on, back in the 1980s, so that's why my recommendation was to try that first. I still see those even today! Certainly that's the easiest place to start!