Just from my own experience......I just bought a 50 cigar humidor about a month ago. I did the exact same thing as you described. Here are some things i discovered. The first time i seasoned mine it went to about 50-55. The second time i seasoned it, about 2 days later, it went to about 60. The THIRD time i seasoned it, it went up to 70 but slowly dropped to about 65. The FOURTH time i seasoned it, it shot right up to 70 and has stayed there ever since. I personally think that the more wood a humidor contains the more moisture. Everying in the humidor that is below the humidity that you want to achieve will constantly wich away the moisture until everything reaches an equilibrium. And when i mean everything, that includes the cigars. I bought a 20 pack of Flor de Olivas that i know were a little dry and tried putting them in all at once before the humidity was high enough. The process has to be a slow one. Hope this helps.