Okay, thanks. That fixed it. Though I'm positive I didn't mark it as required originally. Even now, if I go back into the form, it's marked as required and I can't uncheck it. This happens a lot. Similarly, the records request field is marked as required but the form script doesn't generate the red asterisk. This too happens often. It usually takes me hours to do even a simple form. Perhaps the next upgrade will solve my problem.
Anyway, thanks again!