15 miles? spread out throughout the whole week? 2 mile rides a day? I couldn't see being able to judge a saddle from that short a time frame. And the lacing is only exacerbating your problem.

That said, my B-17 took quite a few adjustments for me to not either be sliding forward or going numb. Also as PDXaero said, it's not the best for multiple hand positions. If you get it comfortable when you're on the hoods, you'll be going numb in the drops. or, comfy in the drops and you're sliding backwards on the hoods.