Dick Coers
White oak can be a lot tougher to dry than red. The cellular structure of white oak makes it tougher for water to get out. That said, in that amount of time, it should not still had drying issues. It can depend on the type of tree as well. If it was a leaner, it can have what is called reaction wood. There are lots of stresses in reaction wood. I would stand the boards up so air can get all around it and see if it calms down over a week or so.