Sounds like you may not have your humidor fully seasoned just yet. What I would recommend is reading this thread closely for information on seasoning a new humidor:
http://www.cigarasylum.com/vb/showthread.php?t=620
You can put your sticks in a zip-lock for the time it will take the humidor to stabilize. Lots of people store their cigars well in to the low 50% range. I am experimenting with 58% right now and am liking the results.