I just got my Engel half pad in the mail. I ordered a small. I love the look and feel of it, and I tried it on under my saddle and the front fits good but my saddle covers a little of the sheepskin in the back. Is that okay? Or is the saddle supposed to fit completely down 'in' the pad where there's no sheepskin? Btw, I have the one with pommel and cantle rolls. And my saddle is 16.5 inches, hunt seat.