I called the DR embassy in Canada and the guy with whom I spoke was unaware of overstaying a tourist visa of 30 days and recommended to pay an additional tourist visa, at the airport while exiting the country. In fact the reason I was calling was to get an extending tourist visa (6-7 weeks) in hand before arriving. It make me wonder, who or what is behind these "random" refusals of entry. And thanks so much for reposting.