You are certainly having to fuss with this humidity issue more than the average bear! The household fridge is certainly operating at more “normal’ humidity levels. I would really appreciate if you would post a picture of your refrigerator set-up.
The very best advice I can offer is that you trust your nose–which you are already doing. So long as your temperature has been constantly within the safe range–something you have confirmed–you should have no problem. It may just be that you will not have pulled out as much moisture as would be optimal. The fact that the fat crusted, you can be certain that have reduced the moisture level all around.
How much longer are you planning to age? I would certainly flip the meat over and put it fat cap down for the rest of the aging period.
And if you can–send beauty shots!! 😉