This is only the second time I have tried purchasing rough cut lumber and trying to plane it down to required dimensions. I purchased about 150 BF of air-dried poplar. I do not own a moisture meter but according to mill, the wood has been air-drying for a few months. Once I milled a few pieces (not to final dimension) I noticed the boards beginning to warp and twist. I re-stacked and clamped them down but I am afraid the wood isn't dry enough and they will continue to move. I am not sure what to do at this point. I have a dehumidifier in my basement and it normally is around 50-60%. Any suggestions would be appreciated.