I have a quick question regarding wood movement. I recently purchased a DW735 power planer. I decided to test it out on some flat sawn white-oak I had laying around. The wood has been in my dry shop for several months. It was straight, but fairly cupped to the bark side of the tree. I jointed the concave side and then ran it through the planer with the jointed face down. The board came out extremely flat and I was very pleased with the surface quality. I left the piece in the garage for several days. About a week later I checked the piece again and it had cupped a bit on me. The wood is pretty dry and I only took about 1/32nd off of each side. Is this fairly normal?