Better check to make sure that they are date fields that really have global storage enabled. What you describe is possible for fields that do not have global storage specified. While in browse mode, you see the contents of these fields from the context of the current record. Assuming that these fields are in the header, when you preview, print or PDF, these fields display data from the context of the first record in the found set, but this would not be the case if the fields have global storage specified in field options.
Global Storage was unchecked. That did it!!
That was easy! Thanks!!