I had this same problem a while back with paper that had a cream colored D-min and with this paper I had trouble getting good color balance, for example skin tones were especially difficult to balance. It was suspect from the get-go, as I had purchased it off ebay from an individual who claimed it was refrigerated. So I switched to paper I knew was fresh and the problem went away. I think it is safe to say that in your case and mine the problem is expired paper. Don't use it!

RPC