I've had nothing but problems with this issue. I inserted a date field and got it to work until it is saved. When I open the PDF, it is blank. The same code works in another file fine.
Also, I have some fields that get calculated. I set the calculated order to get it to work, but when I save and open, the order gets reset. Its like these changes aren't getting saved. Am I doing something wrong?
Regarding the second issue, I've seen some folks report something similar, but have not been able to nail down a cause. For some it seems to just start working correctly. It is probably not something you're doing wrong. I'd be interested in looking at a form that behaves this way.
George