I wouldn't even assume the cockpit is too long. A saddle that's too wedge (pear) shaped can force you forward so that you couldn't be on your sitbones no matter how close to the bars you are. And yes, that saddle is not only very wedge-shaped, it's got an extremely wide nose. Considering you've got two issues that could both be related to saddle shape, I'd try a more T-shaped saddle before I did any other fit tweaks.