Originally Posted by froze
Perhaps the saddle is too far rearward-this could also cause the slide effect your experiencing.
I was wondering if that could explain the hammocking sagging effect too. Saddle too far back, butt too far forward, weight not where the saddle is expecting it... for me on both of the Brooks I've used (small sample, lowish miles (4 figures) yadda yadda) I've had to put them as far forward as they can go, unlike 'modern' saddles...